I just bought Dell Studio 15 for my wife, it came with Vista 32bit. The first thing I did was dumped hard disk partitions and installed Vista on my own. Oh my god, Vista is such a pig by default the OS was using 1Gb of 3GB of ram!!! I tweaked it and tweaked it but could not get it below 750Mb of ram on the boot. Still the OS was horribly slow, since I have Windows 7 64bit 7057 RC1 build I have decided to reinstall Windows 7 on her machine (T4200 CPU, 3GM of RAM, Intel video card)....and WOW what a difference!!!! yes the OS & still uses about 550Mb of ram, but it's ridiculously fast even in 64bit compared to crappy Vista 32bit. And all her hardware was detected, I just had to install video card everything else Windows 7 found. I got yer iTunes 64bit and she is flying, I'm blown away...she has been runing it for about a week and not a single problem. Looks like Windows 7 even RC1 is already in great shape... I really had no chice since XP drivers are not available for Studio 15. I'm happy with XP on my laptop but I'm already experimenting as well with Windows 7 RC1 on my laptop as well (dual boot, Dell Precision Mobile Workstation M90, T7200 CPU, 4GB of Ram, nVidia FX 2500M 512MB of ram) it detected all my hardware as well. I will need to do a lot of testing for my development or games but Windows 7 looks promising as a replacement for XP.