With that receiver I would not think you would need an amp. I've tried various receiver only and receiver/amp combinations, I don't know if I would say there is more detail as an amp amplifies, doesn't make things magically more detailes.

I do get some more headroom when using amps that might help during dynamic movies or music, but most receivers alone should be adequate.

I agree with Jay on Outlaw, or maybe look at Axiom's offerings.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85