Sedan Radio Question

[Yaris08]

I've got a couple questions about upgrading my 08 sedan's stock radio. Are their any specs available for the current radio. I know almost any new head unit will be better, but just curious as I look at specs. I tried search here and google w/o luck.

Also, I've been using Crutchfield so far for looking at radios by inputting my Yaris info and it tells me what is ok to use, but am I really limited to the models they list? I ordered the center bezel already from Parts.com (saw it in a few other posts) and know I will need the metra filler kit and the wiring harness, so as far as I suspect I should be able to use anything.

BTW - I used the DIY manual to change out the rear 6x9s and that thing was guide made it very easy to do!