mmm with 6s lipo

Im currently lanning on building a brushless 1/8 buggy. I was looking to use the 2200kv motor so i could run 2x3s lipos in series to make it a 6s. But now im thinking this could cause problems so would i be better off using the 2650kv motor and just using single 3s batteries or 2x3s batteries in parallel to give extra run time? Some of you will probably be asking why i dont use 4s lipos thats because i use only 3s lipos for my rc helicopters so ive already got plenty of them.