I've been using two RSX-4s hooked up to the Ultra PM 5.1 set, and they just died. Depending on costs, I might just upgrade it keeping the RSX-4s and moving to a proper system since I don't even use the surround sound.
What would be a good matching sub + amp (maybe a pre-amp, I really like having a small controller) for it? I don't want to spend too much, but I definitely want something better than the 5.1 sub, since it is going to be an upgrade.