Investing is a curious word when used in conjunction with the purchase of equipment that immediately depreciates in value!
I'd personally hang on and see what happens with the XBox 360 vs the Playstation 3... I guess it depends on whether or not backwards compatibility is important, plus which system has the potential to run homebrew code / emulators, plus the set of games available at launch, game cost, etc...
I rushed in at the launch of the previous generation of consoles and bought a GameCube - which on paper at least would appear more capable than the PS2, but history has shown that I made the wrong choice in terms of the availability and cost of the games available...
So this time, I'll wait and see, and maybe make a decision once the initial hype has worn off! Besides, the ol' GameCube still plays Burnout and Burnout 2 fine - which is mainly what I use it for!
- Ali