New Stereo Need Help in Amp Decision

Hey everyone, I'm getting a new stereo and I need help on picking the amp. The subwoofer is a Ma Audio 10" XE...Dual 4 Ohm Coils(Best way to hook these up?), 300 watts RMS, 600 watts Max. The Amps I'm looking at for this sub are either.. Ma Audio M1883i- 400w x 1 Rms @ 4ohm Mono, 800w x 1 @ 2ohm Mono..Or Ma Audio M683i- 200w x 2 @ 4ohm Stereo, 400w x 2 @ 2ohm Stereo, 800w x 1 @ 4 Ohm Bridged Both amps are the same price...just looking for the best choice! Your help is GREATLY appreciated as I'm going to be purchasing this next week. One more question..this new stereo, plus a 4 channel, plus I have neons and an LED underbody inside the car..would it be wise to get a Voltmeter to watch the power and when it gets REALLY low know to start my car. How would I hook one up and where can I get one. Thanks for all your help you guys are great.

The thing is I want the whole setup to be Ma Audio. I'm not going for HUGE bass sounds, just enough to where I can feel it there...mostly the stereo is for show purposes...but also so when I'm driving I can jam.

Any opinions on the voltmeter?? Just been thinking about it.

and Places I can get one.

You can get a Stinger SVOLTG2 http://www.sfxaudio.com/products/dispItem.asp?ProdId=63282 or you could get a digital distribution block http://www.darvex.com/miva/merchant.mv?Screen=PROD&Store_Code=D&Product_Code=CQPD-52222 another option would be to get a digital Capacitor http://store.yahoo.com/mobile-emotions/noname27.html But if your going to be using allot of power with the car off I would suggest that you add a 2nd battery and get a battery isolator. What that will do is give you a main starting battery and a 2nd battery to run you accessories off of. The isolator will separate them so if your accessories battery becomes low your car will still start off of the main battery. Then they will both charge once the car is running.