Hi All. I'm considering this amp to run my Infinity Kappa components in the doors and bridge the other two channels to run a single 10" WLaurant-style sub. My questions are whether this will produce enough power for the sub and whether this amp will fit on a spare-tire mounted amp rack? Also, to meet my budget I'm seriously considering going the non-authorized dealer route and so would like to know if others have found this model reliable or somewhat probematic? Any thoughts would be appreciated... Thanks