So I wanna put 2 18's in my room, but I can't decide between soundqubed hdc4 or sundown x-18. I know soundqubed isn't really meant for sealed enclosures, so I can't do a 4th order with it. But with the sundown's I can, but I know the x seriously are already made or the lows. So now I'm deciding to do just a ported box for both, but my question is money isn't a problem or amp or anything else but which sub would perform better and last better, each sub would be getting 2k rms each so a total of 4k rms for one pair of subs. I know the sundowns can easily handle 2k to 2.5k for one sub. But the soundqubed can only handle 2k max.