EXTREMELY happy with Vista 64 - get yourself that and be content. with Photoshop Windows CS4 being full 64bit now the future has arrived. no more scratch disk use ever - its amazing, and so mush faster - I save about an hour a day.
I was reading about someone who uses 96Gb of RAM on their Vista 64 workstation for 8x10" scans in 48bit with layers - and says it does an amazing job.
hallelujah for true full 64bit computing finally arriving in the real world.