Front speaker wiring options?

Hey all, I have a set of MB Quart Q series 5.25" front speakers that I am running off of a Rockford Fosgate Power 551x. The Quarts are 4Ohm speakers. I am currently bridging the 4 channel 551x therefore running it at 2ohms (I think) with the gain turned all the way down, it is heating up pretty quickly and today it shut down. I have owned this amp for a couple of years and have always run it to 4 speakers at 4ohms. I am assuming that the problem is that it is not 2ohm stable while bridged, is this a logical assumption? I looked at the Fosgate website and it lists the amp at 4channel 4ohms, 2 channel 4ohms, and 4 channel 2ohms, but not 2 channel 2ohms. My question is this: can someone suggest the best wiring options that I have? I know that I could run half of the amp, but I would like to give the speakers the extra power (unless someone can tell me a reason that I shouldn't) In my current setup, I am running the rear speakers off of deck power. I would remove them completely, but I want my rear passengers to at least have SOME mids and highs, and not just hear bass. On top of that I am planning on running 5.1 sometime in the future. My current ideas: 1. bi-amp the front speakers (but I think I need an external crossover for this??? 2. run the front speakers off of half of the amp, wait, and use the other half of the amp for the center channel speaker when I do 5.1 On second thought I have another question: What will the difference be that I hear from the Quarts running at 275 watts/channel (what it is currently pushing at 2ohms)vs. 70 watts/channel (each channel at 4ohms) vs. 140 watts/channel (bi-amped at 4ohms) ok, I think that covers it all thanks for the help in advanced

damn, I really didn't want to hear that. Thank you though. Anyone with other ideas?

Oh yeah, I forgot. In the manual for the Quarts, there is a diagram for bi-amping them using the crossovers that came with the speakers. Not sure if that means that they are actually suitbale for it, but then again, maybe it does? If it does, could I run 1/2 of the amp to the woofers and 1/2 to the tweeters? thanks again

You can bi-amp if you want, which means you DON'T use the supplied crossovers that came with the speakers.  You'd be using the active crossovers built into the amp instead.My ex once told me I have a perfect face for radio.