Originally Posted by raks
Over a year ago, when I first got started with Vista x64, I also dual-booted between XP and Vista x64. I didn't have any problems with either after that, but the 3 weeks or so that followed my Vista installation, I realized that I hadn't booted into XP for anything of consequence, and that Vista x64 was working for me even better than I anticipated.
So I proceeded to backup the new data that was added in that time, formatted all my hard disks, and re-installed only Vista x64. I haven't looked back since.
All the games I play, such as the now classic Diablo 2 Lord of Destruction, Empire Earth, and even Tetris 4000 works better than they ever did under XP. The newer Tomb Raider games, Legend and Anniversary are also operating very well. My list of larger applications like Microsoft Office, Borland Delphi, Adobe Premiere Elements are what I use every day, and they work perfectly. The same can be said about the utilities, such as WinZip, MainConcept Encoder and MagicISO.
It all really depends on what you want to install. Most mainstream consumer software packages (large and small) will work without issues. The problem suites are usually the proprietary software packages such as those used for cell phones, or some other specialist tasks.
My recommendation to you? Stick with Vista x64.