ANyone knows if performance teknique amps are good? A friend of mines wants to trade his performance teknique amp rated at 170 x 2channel @ 4ohms or 240W 2 channel @ 2ohms and 480W @ 1 channel bridge for my AUdiobahn intake series amp 2 channel A8002t Rated at 200 watts per channel at 4ohms and 400 watts per channel at 2ohms and 800 watts bridge . WHich amp is better?