hey dood, i ahve the Hifonics Zeus z400 Amp pushing two 2000 model RF punch XLC subs, they sound lke 10's. good clean sounds, nice power, they move but good.
i liek them they used to be one of teh best names in car audio, and now stuill make a very good budget/entry level amp...
hope that helps
their new son of boltar amp is supposed to wicked.