Changing amps?

So I am curentley thinking about changing to a different amp. I curentley use a Pioneer VSX-1014 7.1ch reciever. I use it to drive a set of JM Lab 906 speakers. My question is would it make sense and sound good for me to go to something like a NAD 7100 integrated or a Arcam Diva A 65+? Or would it be better to go with seperates if I can find them used. I was also really toying with the idea of a tube amp but I dont think I really have the budget for one. I have found a few cheap tube amps here on audiogon like the electric baby but I dont know if it could power my speakers well enough. Thanks for any advice.