I have a M&K K3 speaker system that I am currently running with a HK AVR2000 Reciever. Looking for a place to spend som money the reciever is an obvious place. I am very happy with my speakers where the most important factor was size versus sound quality. I have upgraded the K9 sub to a Monitor Audio FB212 sub which packs a bit more punch and actually makes the whole assembly sound much bigger than it really is. The K3 speakers are small in size but not easy driven all rated at 4 ohms. I really like the Pioneer range of recievers 2011 and VSA AX10 but not sure if they are optimal for my speakers powerwise? Should I go for separates? which ones? or are there any integrated recievers that will do the trick?