Whats your impression of Sony amps? Also, im looking at the XM-1902GX (Mobile ES line), and its at $240.00...yet it only puts out 150 x 2 at 4 ohms...which is the same power as the XM-1502SX (regular Xplod line) but the XM-1502SX is $200.00? The specs look the same for both too. Whats the deal?