>>I will audition an EP500 or EP600 sometime this year. If it is a clear step up from my PB12-Plus 2 I will keep it. If not it will go back to its homeland.

Yep, that is the comparison everyone wants to see, including me

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8