Okay, it's only fresh out of beta, but I figured "I have a fresh HD, so what have I got to lose?" So, I reinstalled Vista Home Premium and fired up my laptop. Without SP1, my laptops a drag-fest, I can't even watch videos in iTunes. With SP1, it was like having XP back on my computer, it is actually a lot better than I thought it would be. The speed is a lot better, and no evil Blue Screen of Death for 2 days straight. Considering this is just a Release Candidate, I can't wait to see what the final product will be like.
I'll update on this when I get my libraries back on mny machine.
And here's a little comparison for those who have it.
Photoshop CS3 loaded in Five Seconds (from the time I double clicked to the time the splash screen went away)