Well, even if you said cost doesn't matter, the Panasonic GH2 is one of the best DSLRs in the market. Even if strictly not a "DSLR" because it doesn't have the mirror or optical viewfinder, it competes with any 5D, 7D and such. It has less aliasing and rolling shutter and has some features that are hard to find in any DSLR, especially at that price, like the ex tele conversion that basically lets you zoom in by x2.6 using a small part of the sensor, without losing light...it also has touch screen and the autofocus system is super fast. And for those of you who say that the MFT sensor size is too small for depth of field, try the GH2 with a f0.95 lens! If you are in Los Angeles and need to rent one, try this camera rental house. They have pretty good prices.
