I actually use a pair of Magnepan MGII's as mains, one Polk Monitor 7C as the center, and the Pioneer BS21's as the rears. Also running a Cambridge Basscube 8. It's a bit of a mix, but it sounds good to my ears
Although, sticking with the Pioneer towers, center, and sub isn't a bad way to go. They sound very good for their price point.
Yeah I just think the towers are kinda gross looking to be honest. Well I probably won't be updating for a while this was my splurge purchase along with a pait of m80's. Gotta save up some more for grad school and then many splurge again when there's another good deal haha.