NastySSoo

I have been running my MTI stage2R heads and C1 cam for almost two years and 34000 miles. Ive been very happy with this combo. Everybody is now going with these huge cams. Im not into dyno #s but rather track results. My question, What cam do you think would improve my combo (with an M6) without going so big as to have to flycut the pistons. I would like to have a C2 or TR224 but I dont feel the gain would be worth the swap. Im open to any input. Thanx