Tower defence games for Consoles

[Onizuka]

Hi dear Tower Defence Games fans!!

I'm looking for some good Tower Defence games for my consoles. I own a PS3 and a XBOX360. Also for Macs would be nice.

A friend already told me to get Defense Grid: The Awakening, which so far looks pretty good.
However I'd like to have a choice (although I might just get them all at some point :P).

I'd also like to know your oppinions if you know the game/s and what do you think of them.

A little help on where I could purchase them would also be great. About Defense Grid: The Awakening I looked at play.com and did only find it for PC. I also took a look at a big sales company here in Spain (where I live) and didn't find it.

Thanks a lot!

Kind regards,

Onizuka