SSA I am looking for a 4 channel amplifier to power a pair of components so that I can add rear deck speaker or go active at a later time. The two main amps I am looking at are the SKAR Audio LP-80.4 and RE Audio USX-4250. Is there any knowledge of if these amps put out what they are rated at in clean power? Are there better amps for around $175? Thanks, hayestc