Should I get Vista 32 bit or 64 bit?

In terms of gaming, what benefits does Vista 64 bit offer. Will RAM be used the same? Price wise, the difference between the two is only like $20, so I'm just curious as which one would be better specifically for gaming?Should I get Vista 32 bit or 64 bit?
if you have a cpu that supports 64 bit why would you get a 32bit OS ? and for gaming now its better to have 4GB ram and only 64 bit OS supports that much ram so yea just get the 64 bit one dont even ask yourself the question twice.Should I get Vista 32 bit or 64 bit?
Right now there is very little benefit from 64 bit. If you want a high compatibility PC get 32 bit... If you want a future proof PC get 64 bit. There has been a few tests done with 2GB vs 4 GB. There is only about a 1.6% difference when playing games. Though they do tend to load a bit quicker... Almost 50% in some cases. If all your doing is running a game and not much else... Then 2 GB is good enough for a 32 bit system. If your going to run a 64 bit system get 4 GB of RAM.