how do you compare the hegel h80 to rogue sphinx v2???

Give them both a listen and let us know. They should be pretty different sounding so it maybe a matter if you want the tube or ss sound. 

Keep the Hegel. Rogue Class D amps have no low end, especially at low volume. 

I don't see this as much of a step up at all.  What motivated the change?  Are you locked in?  Or?  What were you trying to achieve?  Although they will have different presentations, they're both great-bang-for-the-buck products, but hardly the last word in sophistication or subtlety.

@jmlab926 

I'm saying the Rogue hybrid amps (Sphinx and Pharaoh) struggle with the lowest octaves. It's as though they have a sharp roll-off under ~40 Hz. I don't know if it has to do with their class D topology, but I haven't experienced this issue with any class AB amps.