Microgaming and unibet but neither have full HUD or database support.

Arghh, so sad to hear about microgaming and no pt4 support. Played there before and liked it. I will never play at william hill again, so hard to find something.

microgaming has a really good rake structure and the games at EUR 5 and EUR 10 were decent although above that there did not seem to be many fish

I found the Microgaming plo2 too tough for me. Tried also the lowest PLO Unibet but lost my roll. Prefer playing plo20 and 50 elsewhere. The Finnish-Austrian site is playable but I am not there so it can be a bit tough.

None. Wait for RIO to launch.