13" MBP Processor Conundrum

I know there's been a million 13" threads created this week, but I can't see any that are relevant to this. If there are one or two, please forgive my missing them...

I'm buying a 13" MBP. I'm just trying to decide between the two processors.

I'll be using it for recording music from my Roland HD1 drum set, and I have a buddy who's going to buy the same MBP to use for recording his guitar, piano, etc etc. I'll be using the same MBP (plugged into a 24" screen) to do the mixing, editing, etc in GarageBand (for now, maybe Pro Tools later).

I'm not playing video games with it, or editing movies etc, so I'm not sure I need the 9600 chip. I know about Snow Leopard using the GPU, but I can cross that bridge in Sept if it's really that big of a performance jump. Having said that, if there's something else I'm missing about the 9600 chip, please let me know.

Back to the 13"... other than the difference between the two processors, the only other things are the RAM and HD. The HD is irrelevant, since I'll be putting a 500GB drive in - and the RAM would only cost me $100 to upgrade on my own if I got the lower processor.

So... (in Canadian prices)

13" @ 2.26GHz: $1399 + $100 (4GB RAM) + $130 (500GB HD) = $1629

vs

13" @ 2.53GHz: $1749 + $130 (500GB HD) = $1879

Difference: $250.

Question: For my identified use (audio recording, editing, converting, etc), would the processor jump from 2.26 to 2.53 be worth the extra $250? Keep in mind, there's no (that I know of) increase in bus speed or cache, just straight clockspeed.

Thanks. I've been wrestling with this all week. I've read lots of posts and threads and articles, but ultimately I guess I'm at the point where I just need some interactive advice from actual Mac users...