I was lucky enough to know people going to Gencon and I was able to get my hands on a Decimator and YT2400. I haven't been able to play with them all that much, but from what I have been able to do, I've loved. The most experience I have is with the Decimator. Full disclosure, Captain Oicunn is everything I ever wanted in a big ship, and he is SOOOOOOOO much fun to play even though I have no idea how I can make it work competitively.
My list has been as follows (confession: I have never run a 2 ship lists and this goes against everything I have held dear and true to myself)
Captain Oicunn
-Predator
-Dauntless
-Mara Jade
-Navigator
-Rebel Captive
-Engine Upgrade
60 points
Whisper
-VI
-FCS
-ACD
39 points
Strategy has been, get the Decimator lined up to ram, and try to keep it in range 1 to throw stresses while Whisper plays clean up. I played a game where I drew 4 direct hits on the Decimator and it never slowed down. Engine upgrade helps turn in sharper or boost into range 1 to make sure you're stressing all possible ships. Predator lets you reroll 1/2 attack depending (lone wolf might work better here), and you have the title if you need to focus this turn and don't need to boost / can safely pull off a green maneuver. Keeping your opponent stressed so he can't k-turn behind you has made it run very successful so far. I don't know that this has any place competitively, but it is the most fun I've had running any X-wing list.