alas no nit picking here my friend 
The fault lies with how vague I answered Specialized versus Everyday uses.
I guess I tend to err on the side of caution for fear of that one person who would try some huge project in ignorance and then be fuming when they didn’t realize the the limitations of their output speed.
(would hate to have a new user to macs purchase something then feel it “wasn’t enough”)
I can also tell by your use of analog and dedicated hardware that you are a “speciality” user (aka power user) and knowledgeable in your recording.
Although I advocate the “digital recording” era I think most professionals still realize that specialized hardware and analog is more forgiving and can actually produce better quality then a small budget limited digital system.
I should have clarified that “everyday use” would the average home user or one that already has other dedicated hardware where as a specialized user was one that already knew the specifications of their needs and utiized it some certain feature (like fw800 or dedicated video card for extensive video use)
Apple put everyone in an odd situation with their current configurations of laptops.
The MBP and the MB currently is an odd lineup.
Odd because bare bones they are almost identical when comparing HD, FSB and CPU.
Most lineups would be some noticeable difference in speed and performance defining the differences but the MB and MBP don’t.
Kinda like car models as an analogy. The MB is the base model, the MBP is the “luxury” model but both are built on the same frame and use the same engine and performance.
The MBP truly has certain luxury offerings like the ambient light sensor, larger screen, optional gloss vs anti-glare, FW 800, DVI output and Express slot.
What sucks is that the MBP only comes in 15 & 17 models so there is no “compact luxury model” which for many is a huge selling feature because they want a small footprint. This small footprint also defines the line from the MBA as well. The MBA is by far a road warrior specialty model but its footprint is still large for a sub-notebook where size and weight matters I would wonder why Apple didn’t release a 12" MBA
In truth I counsel people currently that if they are not needing the needs of a dedicated video card and the “luxury options” are not deal breaking selling points that the mid range MB is the best computer for the money.
It is really cool that the MB is beefy enough to give consumers the options because it really comes down to personal preference and need.
Until Apple revamps the MBP line (they are supposed to this week or next unless they hold off until June) they line that defines the two lines is very very small and comes down to the user deciding if the luxury items is worth the extra cost.
When the lineup changes then the performance line will be redefined once again because the MBP will come in 2.4GHz 2.6GHz and 2.8Ghz and have 6MB of cache instead of the 4MB. They will also use the 45nm Peryn chips which will give 20-50% speed increase on most everyday applications (MS Office, safari, mail, etc) and a 10-40% speed increase on specialty software (Logic, Photoshop, Indesign, etc) at the same speeds. (this is conjecture and not certain fact as of this writing yet …
)
When that happens then the choices will be much easier to make and the price difference between the MB and MBP will be easier defined because you will be able to easily choose between the 2.2 Core Duo 65nm w/4MB cache MB or a 2.4-2.8GHZ Core due Peryn 45nm w/6MB cache and a speed increase of 10-50% making the MacBook Pro an actual “Pro” machine instead of just a Luxury MacBook model as it currently is.
This happened with the Mac Pro and iMac a few months back. Before the Pro’s were updated with the Peryn chips and the the iMac was revamped in August the imac was actually outperforming the Pro’s in many aspects making people wonder what in the world was going on.
Then apple quitely updated the Mac Pros to the peryn chips and started offering them with 8 cores as a standard, once again redifing the performance line between the two models.
I do not know why Apple does this but it seems to happen a lot. They beef up one model causing an overlap and thus switching people from one model to another at certain times then after a few months they beef up the other line redifing performance.
In the end for the matter of this discussion I think it comes down to one main thing.
When you choose to buy more so than what your going to buy. 
Right now until the MBP line is revamped a MB is a really good buy for an everday user because you get the performance of the MBP at two thirds the cost (sans the dedicated video card and luxury items).
Until the MBP is revamped the choice truly comes down to just feature prefernces in the end mainly