This is a topic near and dear to me. My biggest complaint is that no one will cater to the high roller.
32 Red will give you high limits, fast cashouts, and great customer service. But nothing in terms of bonuses.
VIP and Intercasino have high limits, mediocre customer service, and again not much in perks. They also have a really ridiculous software control that shuts the player down when he wins 8 or 10k.
Wager Junction has pretty good bonus offers and loss rebates, but slow cashouts, and the player can only cash 5k per week.
There are a bunch of other RTG casinos that I would consider rogue that will offer unbelievable bonus offers, but it may take years to cash out if you win big.
If you find someone who will cater to highrollers please let us know. This is exactly the player I try to court.