I have been using Vista for about a year now on a computer I built wth an eye to using Vista. The choices are not the best now, but they wern't bad at the time.
I have an Antec 900 case (still a good choice), a PC Power & Cooling silent 850 power supply (still a good choice), a DFI Infinity 3200 board (would choose an Asus if I did it again, an AMD Athalon 64 X2 6000, 4 gig of Corsair memory, 3 Western Digital 350 Gig hard drives and the usual CD DVD memory card rteaders. I also have 2 Sapphire Radeon X1950 Pro 512 video in Cross Fire. The last was probably an over kill, but not bad a year ago. i was very careful to get the latest drivers. I had a problem with the first installation which was interrupted by a knee repalcement. I reinstalled from scratch and installed all the updates after installing Trend Micro Internet Security. All went well, though I had to update some of the programs. The system was stable and Dream Scene and Stardock work fine, and I have power enough to run them with no problems. I have a Davis weather station and their driver and software works fine, though it was written before Vista. I had a problem with Trend Micro when I installed Service Pack. I still haven't solved that problem. I am using the security provided by vista as well as Avira Anti Virus with no problems. the system appears to be stable and fast. I would recommend Vista if you do your homework. I haven't looked back since I switched to Vista.
Jim Cook