I am running a Type-R 1221D and i have 2 boxes already made. a 1.0 ft3 and a 1.4 ft3. I know they arent too much different but which one do you guys recommend would sound better? As of now i am running a kenwood kac-829 (300W RMS) to it and im planning on getting the U.S. Acoustics USX2080 which will be giving it 280 RMS. Recomendations anyone?