Just want to make sure I can't go wrong either way. I have a 72 x 30 I am putting together, and I know the Ecotech is the Rolls Royce right now, but AI seems to have a lot people happy as well. The XR 30 Pro are Gen 3, and the Hydras are 26 HD. 2 HDs may hit me for a little over 300 together, the Radions 2 for probably 650