looking for a new cooling solution

[GrInD1901]

hey guys, i was wondering if it was better to get something like bigwater se or get big typhoon and 3 120mm fans with a controller. i have another question. is it possible to slow down fans with only two cords(without a sensor line)? also, which fans should i get? my system doesnt have to be totally quiet, but its gotta be fairly quiet. thanks a lot.