the problem with hondas, in general, is the casing size on the alt... its just really hard to fit enough into that small of a casing size to put out more then 170... but for that, on a daily setup, i would say at a MINIMUM, 220 with atleast 2 good helper batts... wish i could help you with a good link for that size on a honda, but i have yet to see any quuality ones
i know that mechman will build a custom alt for you, but that can be pretty pricey... but if you can afford it, it'll def be worth it
DC also has great quality, and will build custom... but their custom builds can take FOREVER, and are also somewhat pricey
you might also want to contact ohio generators, as they might be able to help you out