My 1st Klipsch speakers were the r28f and they are good speakers for the price(Black Friday discount). Compared to the rp280s or the rf7iis which I now own, there is a big difference when played at high volumes. I've only heard the rp280s in a store but was very impressed. I also have my rf7s hooked to a crown xls1502 and a Marantz receiver for a pre amp. I don't think you could go wrong with a crown amp and I would probably be careful using an insignia receiver as it may not have enough power for the r28s.