If someone who has a Windows system wanted to switch to a Mac,

1. Which Mac runs Windows/Windows-native applications? Specifically, Photoshop CS2.
2. Does the Mac require purchase of all new peripherals (monitor, printer, external hard drives)? (I suspect this answer is, "depends on the peripheral and who made it," but I'm hoping for a "duh, of course it wouldn't!")
3. Would purchase of the Windows-capable Mac mean the peripherals still worked?

The important thing here is to avoid purchasing a Vista-infested box.

ETA: I'm assuming there are good web references with which to educate myself. If you know of any good ones, I'd appreciate your letting me know. :)