Like the others are saying, I think the Rogue has enough power for the speakers. Having auditioned a Rogue Sphinx v1 (with power hungry LS50's), I found that it had sufficient power for my speakers. However, I came to the conclusion that it played all the notes, but not the music so well. Maybe this is what is bothering you too?
Given your budget, you have endless choices. I would recommend buying separates, a good preamp might resolve a lot of your issues.