Vertigo and Image. They put the trades out quickly, go directly to paperback (most of the time), and sell them at prices that won't intimidate new readers. In short, they want to encourage people to buy trades instead of punishing them for trade-waiting like Marvel and DC (for the DC Universe stuff).
I will say, though, that Marvel does a great job with the presentation and quality of their books. I've bought three Marvel Omnibuses and all of them were very well done. DC's Deluxe hardcovers are nice too, but I'd still rather have paperbacks sooner.