In regards of treating players well with excellent customer support and fast withdrawals, I can recommend a few:
All Slots / All Jackpots / First web Casino / Wild Jack / roxy palace / spin palace /ruby fortune – microgaming
Acropolis – playtech
cherry – net entertainment
Bodog / inetbet / – rtg
omni / inter casino – wagerlogic
I think almost everyone will agree on the ones I refer.
Well this is only a few, there are many more, good casinos.
About conversions, that’s another story. Everyone will give you different answers.