yeah, I was seeing that there were a ton of batteries out there. But when people would ask what the best were, those three came up pretty much all of the time.

currently, in this particular build, there is no stock battery.
We were originally going to go with a lightweight braille battery given the weight savings, but when we added in the audio part of the build, things got a bit more mixed up.
The car is a 300zx. The stock alternator puts out 75 amps. But we were looking at either getting a Nissan Quest alternator for 110 amps, or even going with a corvette alternator for 140 amps. We have quite a few other electronics going on in the car to begin with, and we really don't want A) head light dim and B) to strain any of the electrical system.

with the higher amp alternator, as in the 140 amp corvette alternator, would we need anything more than a stock replacement deep cycle battery like a yellow top, or another replacement?
Seems to me, with the bit that I know, that the extra battery just covers up a weak alternator. stepping up to the 140 amp alternator ought to solve the problem, yes?