+1 what they said.
I always install a minime version, so my install is just what I need. Nothing very special, but I only need a fraction of what's in the regular iso.
My machine is 64bit, the 64bitPCLOS is designed for it, so no reason to use the 32bit. IMO
For me the only noticeable diff is a snappier desktop response.
Plus, I suspect that the future is with 64bit.
32bit will eventually
be Legacy, rt?