The EP800 is more along the lines of the PB13 Ultra, maybe even better as the EP800 has DSP, so you can't hurt it.

The Pb12-plus/2 is a different beast than the EP500, I think you would be very happy with either, but I beleive the PB12 has more output by some of the reports/reviews I have seen, none of which have been direct comparisons, simply my own opinoins based on my experiences.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70