if you only want SPL go with the RF Hx2. Just make sure to get the dual 2 ohm version. I personally would get the w3v2, but we have different tastes. But if you have a choice range of more than just those two look into subs like cerwin vega v-max's or RE SE's, I actually got around to hearing both and v-max's are by far the best subs for the price, SE's are also quite good, more expensive but more powerful as well. Good Luck.