IMO Hifonix sux, a lot of people run them but I just don't like their builds. I've always used Panosonic HUs for the money I don't think they can be beat. Even the cheaper models have nice features like full preamp out sets and LPF HPF filters. I really do like the Pioneer Premiers though they r sick. Alpine makes good HUs too. As far as kenwood I've always liked their amps but I don't dabble too much into their subs/HUs.