The best I have seen is definately the new exalt feed gates for the rotor. I checked these out in chicago and they were awesome. Loads great, ket paint in and kept the low profile design of the rotor. The tabs were thick and looked like they would last a lot longer than other designs without wearing down. I was jealous because they were even nicer than there standard exalt feedgate.
Anyways I would say the exalt is the way to go. My second pick would be the crown for the simple fact that it sits higher than the exalt, looks uglier, and the tabs are known to wear down. Absolutely don't purchase the Dye quickfeed. It is an absolute pos.