I do know the Memphis subs are a decent speaker, i have the 400 watt Memphis amp running 6 speakers, 2 of them are 15" Kicker CompVR's. So i know their amps are good, i heard the sub at the store where i bought my system, as far as the power, you will get good sound out of 100 watts/speaker, thats all i have going to my 15's and they pound. I think i would still opt for a little larger amp though, just to have MORE POWER!! ARGH ARGH ARRGH!!
Can't say much about the Autotek amp, as i have really never heard of them,,, /forums/images/graemlins/dunno.gif
As far as how much you should run to speakers, hmm, as i mentioned, i have 2 15's capable of 900 watts each, the amp i have coming for them is a 1500watt amp, so 750 each is pretty stable and not overkill, i guess it just depends on whatthe speakers can handle, i would keep the wattage down somewhat just to protect the speakers from being overpowered and blowin them.
Just my opinion,,, /forums/images/graemlins/waytogo.gif