I'm doing a little price checking to see what it would cost to install a sub in my car (planning on replacing all the speakers as well with 4 Alpine SPS-507, but that's easy). Not looking to wake up the next city over so I'm going with a single 10" sub just to get some more bass. I'm planning on going with an Alpine SWE-1043. Single voice coil, 4ohms, 100-250 RMS, 700 peak watts. I know I need a 2-channel amp and I know it's bad to underpower the subs, but that's about my car audio knowledge in a nutshell. I'm looking at amps on Crutchfield and see "50 watts x 2" and "200 watts RMS x 1 bridged" in the same description. I don't have any idea what I'm looking at so what should I be looking for in an amplifier?