Ok. I confess, I thought you were wondering about towers for front R/L. I did not skimp on my surrounds but I don't think towers are really necessary back there. I would still say towers up front are better for movies or music. Great speakers will sound great no matter what you prefer to use them for, and I don't buy the BS about using lesser speakers if the main purpose is theater only.
I have a pioneer in my bedroom system and it is a great unit. Mcacc works well and it sounds good. I'd have no problem recommending one. Some keep beating the drum about reliability of onkyo, and now say stay away from pioneer since onkyo bought them. Afaik they're still operating separately and don't share anything. And onkyo has gone above and beyond to fix units even after the warranty has expired. I just don't like that they dropped audyssey. That's why I won't buy another one. I also have a Yamaha in the house and it is solid and sounds good but doesn't have ypao so I can't address that, and I don't like the menu structure. Yamaha, pioneer, and marantz/denon will all be good investments.