I'm not sure where I'd put the center if not underneath the tv, the top of the tv is not flat. Would mounting a the center on the wall behind the tv be a good alternative positioning wise?
As for the fronts, well, my main beef is with the center because I've noticed that it really misses the highs during music. I'm okay with the fronts performance, could be because voices don't go through them. I also don't want to spend a whole lot at the moment, around $200.