Re: intel and amd
I'd pick the AMD processor. Basically its like this, AMD's processors pack more instructions per clockcycle, therefore do a better job while at a lower frequency. Intel's are speed demons, but while having a higher frequency (3.6ghz), pack less instructions per clockcycle. That AMD processor is way newer than those two Intel cpus so it's more current with the times. It will probably handle anything you want to throw at, so feel free to go for it!
Rig -- Emachines T5026, 3.06ghz P4, 300W Bestec PSU, 160 sata hd, 512mb dual channel 3200 ram @ 3-3-5-8, ATI Radeon 9250 pci, dual layer 16x dvd+/-rw.