IMO anyone getting a PS3 while liking shooters should check out Super Stardust HD, an amazing game at a very cheap price. If you haven't owned a PS2 before, you may want to opt for a 80GB backwards compatible model (or 60 GB model if still available!), especially the God of War games are very impressive.
I have pre-ordered Ratchet and Clank Future and got a 512 MB R&C memory stick for free.
If you have a HDTV and are interested in high def movies or games, the PS3 is IMO by far the best choice (from a hardware specs, design and value perspecitve), especially for the long run (most impressive games, like MGS4 and Killzone 2!).
If you don't own a handheld console, the PSP seems like a nice option, there are some great games, such as Ratchet and soon a new God of War as well. I may buy one myself this christmas in addition to the Nintendo DS I already own, but mostly to share data with my PS3.