I just recently picked up four Pioneer 6x8 4-way speakers and a AVIC-F700bt head unit that I am going to install in my 2005 Ford Explorer. Speakers: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWNX:IT&item=380108907555 Head Unit: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=380108907555&sspagename=STRK%3AMEWNX%3AIT&viewitem= Anyways the speakers are rated at 50 watts RMS @ 4ohms. Now I am looking for an amplifier that would give me the most w/o worrying out it being a hot p.o.s. I have found two amplifiers that I like one is Alpine MRP-F300 rated at 50wx4 at 4 ohms and the other is a Pioneer GM-6400 rated at 60wx4 at 4 ohms. Both are about $150. I don't know what the rules are on RMS matching from the Amp to the Speakers since I have never installed an aftermarket audio system. I have read that lower power can be worse for speakers and that it is ok to have a little extra juice. Which one? Alpine: http://cgi.ebay.com/ALPINE-MRP-F300...4|66:2|65:12|39:1|240:1318|301:1|293:1|294:50 Apline: 5 Channel http://www.crutchfield.com/p_500MRAF350/Alpine-MRA-F350.html?tp=115 Pioneer: http://cgi.ebay.com/NEW-PIONEER-GM-6400F-4-CHANNEL-CAR-POWER-AMPLIFIER-AMP_W0QQitemZ300297774510QQcmdZViewItemQQptZCar_Amplifiers?hash=item300297774510&_trksid=p3286.c0.m14&_trkparms=72%3A1234|66%3A2|65%3A12|39%3A1|240%3A1318|301%3A0|293%3A1|294%3A50 Lastly I just need tips and advice. Like I said this is my first time ever attempting to install these do you think I could take it on myself (at least the speakers and head unit) or should I leave it for professionals? All input is welcome.