This is an unanswerable question. They all have such a wide variety of products ranging from shit, on up to very nice, it's hard to say. Rockford's new shit is very nice, but doesn't have any recent entries in the 1000w monoblock area, but the Punch EQ is really nice. Alpines new PDX amps are bad ***, but lack a lot of mid-range. Drum sweeps, and the like, sound very flat on PDX amps, when you can hear them. JL Audio's G-series is 'eh' at best, the HD-series is nice, but nowhere near worth the money, and the Slash series is bland, but solid. Don't know shit about Kicker, don't want to, don't care or give a shit. I ****ing hate Kicker, and everything they do.