I'm going to be adding subs to my Mach 460 system in the Mach I. Looking at getting this box: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5734249853 This amp: http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=13120 These subs: http://www.acaraudio.com/product_info.php?cPath=24_47&products_id=880 Question is: will the amp provide enough juice to power these subs adequately? or would i need to step up to this amp? http://www.acaraudio.com/product_info.php?cPath=22_36&products_id=1140 By having these powerful subs will I be overpowing the stock system in any way? Also, the phoenix gold website recommends the box being made of 1" MDF board where as the box on e-bay is only made of 3/4" and 5/8". Will this be a problem? If so, where could i get a box made to fit the stang made of 1" mdf?