Adam, are you running Reaper in W7 64-bit?
Build a bad ass recording desktop, and spend the difference on a decent work/school/fuck-around laptop or netbook.
Next order of business....Do you think there will be any serious heat issues with these laptops that have the desktop i7s? My Macbook Pro gets hot as hell and I can only imagine how much heat a desktop processor crammed into a laptop would create.
Honestly, I don't get how so many of you guys work on dual-cores so well
Trust me I tried :/ The drivers that came on my Snow Leopard CD to use all the Apple hardware Windows are a niiiightmare to get working in XP, it was a disaster uke: Super painless in Win7 though! Would prefer XP but whatever, need to move forward and accept change sooner or later, might as well get used to it now. Win7 seems a lot more stable and efficient than Vista as well, it's pretty solid and I almost like it as much as OSX...
The thing I'd be worried about using a laptop for recording for, would be the hard-drive speed.
I tried recording four microphones once with our Macbook (white Core 2 Duo machine) and it was pretty shit. I was using my Profire 2626 into it, and couldn't manage four microphones without crapping out here and there. Not suitable
I've thought about putting an SSD in it, which should really boost the performance of recording.