If you're looking for pure power, then you probably couldn't go wrong with an AUDIOPIPE. I have one of their 1500 D which puts out 1500+ RMS and got it brand new shipped with warranty for 142.00.
Its the best price to watt ratio of an amp that actually does rated.
Ive personally never owned any HIFONICS amps, however a buddy of mine LOVES them. From my experience with them, I don't think that their quality is excellent, meaning the components which they use to build their amps, I believe are sub par. AGAIN THIS IS MY OPINION. Further Ive seen one clamped before, i believe it was an 1000D, it struggled to put out 900 ish watts AND THEY WERE DISTORTED watts!!! Meaning that the amp was being pushed beyond it limits.
The alpine is a solid choice, so is the AQ, BUT don't just buy one product because the manufacturer claims their produces more power. You will find that more often than not, for most cheaper brands THE AMP WILL NOT produce the power that the manufacturer claims!!!
And if you have any questions in the meantime, ask them here because the wealth of knowledge available is EXTENSIVE.
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