x2120's with a single will get a little hot while towing. You can tow with a HTT 64/71/13ss. The stainless housing helps with spool-up. 90's and 62/71/13ss may be your best bet if your towing heavy though. Just depends how often you tow and how heavy you tow. What do you use the truck for. Daily driver, tow truck, race, sled pull??