I dont see you needing a bigger alternator for that unless you plan to go all out on ur system. say somthing like 2 W7's and other things that go along that high end.
H.O. Alternators are made by
Ohio Generators - you can purchase via Nexxon Car Audionexxon@comcast.net
We have 180 amp for $559
1 year warranty
3 weeks lead time
To place your order go to: http://nexxon.com/orders.htm
Or call 303-470-0695 - toll free 1-866-242-0681
Shipping is always free in the USA.
also there is Dominick Iraggidominick@tds.net
thats all the info he ever gave me. a few ppl on NC have ones from dominick and have no complaints. i just rather have a warrenty but i dont know what dominick offers.
but like i said before, i dont think you need a new alt.