If you were a hold out XP user like I was, then it has been a very satisfying upgrade. I wanted the Vista interface when it came out but held off due to it's performance issues at the time.

For an XP user, it's a no brainer. You should upgrade. A Vista user, I could see as not being in such a hurry. Although, moving from 32 bit to 64 bit has already payed for itself with my latest CD rips going twice as fast, as per my post somewhere about dual-core multitasking on music rips and conversions.

With great power comes Awesome irresponsibility.