Manufactured box w/ sub recommendations

[mynameismatt]

Currently looking at kicker comp r 10's in manufactured box. I know custom is better, but I dont want to build or overpay for one at one of the non-reputable shops in my town. Anyone have suggestions for something better? size and quantity doesn't matter (just cant be over 15 inches), just need something that takes 600-800w RMS at 2 ohm load. Price isn't a huge issue but would rather spend under $400.

Having said that, what do you guys think of this? I'd love a SA-12 in a custom box for under $400, but I dont want to get screwed if it's actually some crappy made pre-fab.

Sundown SA 12 V 1 SA 1 12" Vented Ported Subwoofer Sub Box by Zenclosures | eBay

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