i have a decent receiver VSX 1020K, but i want to add a few extra speakers in the future "high end" i know later on i will have to change my receiver but in the mid time i will like to buy an AMP to fully power my speakers. what will be a good AMP, something good. maybe under 200 dollars. as stated before i will upgrade my whole HT but later on. right now i have 2 Polk monitor 70, 1 Polk CS2 center and a BIG America F12" and im looking for 2 bookshelf to add to that 3.1 system. so what AMP will power those speakers when i crank my volume all the way up.