If they all sound the same, go with the cheapest. But I have heard great things about the Audiobahn line, their new subs and amps are frickin amazing. You may want to expand later and it would suck if your fronts were cheap. However, I would go with bigger speakers than those AB plate speakers, see if they have a 5x7 or 6.5 coaxes, or 6.5 separates if they got it.
warmonger