I have a bunch. I have the new Octopus 350 Diablo with the DC pump - it can get outskimmed by a really old ER 12-2 with the dual sedra 5000 pumps. I am not impressed with the DC Octopus 350 yet, but need to try a few more settings. I have a bubble king 250 with the red dragon - this is one heck of a skimmer, but will not outproduce a pair of ASM G4s at 5x the cost. The best one that I have bought lately was a 8" body octopus with the sicce pump - beast out of the box. I also have a few ASM G4s and a really old ER 12-2 and they are still very good skimmers.
IMO, a pair of good skimmers will outperform a great one, but I also have super large sumps and plenty of room for skimmers.