This is an unanswerable question. They all have such a wide variety of products ranging from ****, on up to very nice, it's hard to say. Rockford's new **** 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 ass, 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 **** about Kicker, don't want to, don't care or give a ****. I ****ing hate Kicker, and everything they do.