i purchASED a 13w6v2 and am considering two boxes, this one is for a 13w7 but i think the w6 would sound great with a little more air space.
13 5" Custom Ported MDF Subwoofer Enclosure for 1 JL Audio® 13W7 Sub W7 Box | eBay
this is a w6 box but looks very well built. is the top link box a good box as well? it kind of looks cheap to me.
JL Audio 13W6V2 Ported Subwoofer Box | eBay