I'd say so yeah.
Us Pro Tools PC guys have a Benchmark called the DVerb test. (dverb is the standard reverb plugin, most cpu of any stock plugin, you basically insert as many of them as possible into a session and try to record for 5 min or until you get an error.)
With my dual core pc I would max out at 80 dverbs, guys with core 2 duos would get 160 max. I couldn't mix without feeling like I had to make compromises for cpu power.
with my new quad Q6600 I'm getting 260+ dverbs. If I got better RAM I could beat that, and if I overclock even to 2.6 Ghz. I'd be well over 300. This is equivalent to a PTHD 7 dsp card system, though with smaller track count and no ADC.
A FUCKLOAD OF POWER for about $1000.
Whatever DAW you use you'll see an improvement.
Absolutely worth the extra $$, as would the P182 case, the one you are getting just looks like a generic case, no soundproofing.
Put this in perspective for how much a quadcore costs.
My Athlon X2 6400 2.2 Ghz dual core cost $800 3 years ago.
the Intel Core 2 Quad Q6600 cost me $219 this year.
my old pc cost $2500, my new cost $1035 and is about 3X better.
You've sold me on the Q6600.. Now I've gotta reconfigure everything 
