I think the 64 bit will handle things better. I find that I can get about 5 good renders at a high setting before it crashes. I'm not the only one that has that problem. I've read many threads about that.

I now have 4gb of ram and it is not as bad, so, my thinking is how poser handles the memory is the problem and 64bit should help solve that problem. At least it does for every other program I use.