No, having 6 channels is a matter of convenience, and for that you generally pay extra. Just like you would for any other feature.
I picked up a couple of these to bridge for my front stage..
Cerwin Vega EXL400.4 Car Amp: items on eBay.com
After i buy a new vehicle i'll get some JL HDs, but those will do the trick for now and should sound every bit as magical as a Zuki.
I'd do that, and get an additional monoblock. Another option, however, would be to get an amp like a big belle, bridge the full range channels and get a seperate amp for mid or tweet duty.