hi, im thinking of changing my amp, which is a rotel ra04, im keeping my monitor audio bx5s and cam audio cd 650, and denon fm tuner, i also use an ipod connected with phono leads, i listen to rock and all music in general and fm radio my room is 15x12 and my budget is 450/500, i will audition when i make my choice, can anyone recommend an amp that will go well with the monitor audio bx5s thanks