I’m not really an expert on promoting poker. I have poker players through Bet365 (Affiliate365.com) and Vip but the only poker room I’ve really promoted is SuperiorPoker (SuperiorShare.com who have a forum here).
They seem reliable to me (they pay on time and track properly) and the poker room (http://www.superiorpoker.com ) offers some poker variants that you don’t get elsewhere, so it’s definitely one for your list, methinks.