Used 5ch Amp (Classe, Krell, Rotel)

Looking for a really good used 5 channel amp. I do not want to spend $1000ss on a brand new amp.
So far my brief research has led me to Classe 5200 and Krell Chorus 5200 and they are a little pricy even used. Not sure if I want to pay 4k for a krell or classe yet! I have listened to Parasound & Mac but I did not prefer its darkish sound. Currently I have dynaudio c20 speakers as 2ch and Paradigm center and 4 towers in the back and they are being powered by Rotel RMB 1075 and the preamp section is Arcam AVR 550. I do 50% music & 50% movies. Again looking for an amp that will sound much better than my current Rotel RMB 1075 amp! Any advise would be greatly appreciated!

Thanks!!