Currently the mains are running of a rotel power amp rb1080 and the Center C2 is running of Marantz SR6006 receiver . I do not have any processor not planning for it now .I am currently looking at upgrading the power amp to a 3 channel power amp to drive the FL C FR . Main use of the system will be HT . Will add the sub and the rear speaker later down the track . I am limited to a budget of 3-4k hence looking for a used amp till i can afford something bigger . I have found a Bryston 6b sst and a Krell 250a/3 with in my budget but not sure how they will sound . Please recommed .