I'd look at the RTi 8 fronts. They are perfect if you get a decent sub and cross them over. The RTi series is very power hungry, so if you get the larger ones, you are most likely going to need an additional amp.
Also, the RTi 6s are pretty big speakers, so make sure you've got the room for them in the back. If you want to wall mount, get the RTi 4s or the FXi series, as they already have mounting brackets on the back.
~Chuck