Everyone has their personal favorites, its more of a try it out and find for yourself than something that can be recommended. Each rom has something unique about it that can be appealing to certain people. I would recommend just taking a look through the threads of the custom roms and try the ones that look intriguing to you. I have used MightyRom, Chaos Theory's rom, RaidZero's Baseline and Demolition Rom. They all are 6.5 but do not have TF3D2.