Home or Pro wouldn't make a difference for Home Recording... "Pro" is basically just a means to make business pay more. They took the "Pro" version, turned off certain networking capabilities (something businesses need) and removed things like multi-processor support (more things that businesses need), lowered the price, and called it "Home". That way, Joe Schmoe can get XP for 95 bucks... Businesses, meanwhile, have to pay a hundred bucks more for the same exact OS with a few vital features enabled.
But it'll make no difference to the average home user, and shouldn't have an impact on recording.
I, quite frankly, like XP better. I've found it to be more stable than 2K. But really, there's not much difference. They're built on the same kernel. They have very similar features/interfaces. The only thing you get with XP is visual "fluff" (which I turn off) and built in apps like CD burning capabilities and zip compression (which I like to have, because now I don't need to install as many third-party apps). I run three servers on my XP box, and I use it for my DAW,... and I've never had a more stable machine than the one I'm running on right now.
WATYF