I, too, have a laptop with a 64-bit processor (Compaq R3240US with AMD64 processor). Wifi is vital to me, and I'm told ndiswrapper (necessary for wifi to work with linux) won't work in 64-bit mode. Thus, I'm entertaining the thought of installing 32-bit linux instead of the 64-bit, at least until ndiswrapper (or something similar) can manage 64-bit mode.
My questions are:
1. Exactly what will I be sacrificing by using 32-bit linux vs. 64-bit on this machine?
2. How difficult would it be to upgrade to 64-bit later on?