I've been looking for sub boxes for my F-250 (don't have the time to build one), and I stumbled upon a box from HiFiSoundConnection that was built specifically for my truck. Has anybody ever used a box from them? I'll either be getting this sub box, a Pro Box, although the HiFi box is much cheaper. I sent HiFi an email asking what the dimensions of the box were (mounting depth, cu ft, etc), but could anybody recommend some 10" subs? I'm pretty sure the mounting depth of the ProBox is 4.125".