ok thanks a lot for all of your guys input. I REALLY APPRECIATE IT. ill most likely go ahead and upgrade the alt. and for sure the battery.
One last question so i found this high output 200 amp alt. on ebay its manufactured by Mitsubishi but specific made for my mazda 3. only cost 220+shipping and in description by regulator it says: I/R, so does that mean its internally regulated like you guys are talking about and do you think it seems like a good legit alt.???
....I know all my questions may seem dumb but i just want to make 100% sure.....here's the link for it