I love my 360. Of course I'm in that 18-35 bracket, being 25. And I play more of the first person shooter, run around kill people games such as Crackdown, Ghost Recon, Halo, and Call of Duty. Also alot of racing games as well. But for the kids, I'd definitely say go with the Wii. They are much more kid friendly plus the fact that you're not concerned with DVD's and of course the price being much lower than the others. But as stated, they're hard to find in some areas so if you want to go for that then start looking.
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Jonathan
Former Owner of 2003 SE/SC 4x4