Ok J. I just talked to my 2 DDR kids. They have been avid DDR players since it was an arcade game at the mall.
They say that the Xbox 360 is your best bet. They also play Rock Band and Guitar Hero.
They have every game system imaginable. They spend every penny they get on this!
They are 20 and 16 years old boys.
I have to admit that I play Rock Band with them
. I sing only, because I lack the coordination that I used to have. It is a blast, and a great way to do something interactive with your teenagers.
Good luck J and have fun
!