Depends if fan noise is an issue to you? If you like lower speed fans, I prefer the Hardware Labs Black Ice SR-1 480. Its a great rad, with low FPI and an
excellent build quality. I have three in my case combined with four NoiseBlocker PL-2's on each one, and they are just beautiful.
I guess those thicker XSPC rads are pretty good too, but the quality of the SR-1 is what wins my vote