The_Quiet_One
10+ year member
CarAudio.com Elite
To add to that list super start platinums from O'Reilly's are decent as well assuming they are still made by East Penn.Good batts for the price are Juicebox agm,Duracell agm,energizer agm,deka agm...
To OP:
AGM is just the type of battery.
As far as the RF weren't you the one buying it used for 500? In my opinion you're going to have a hard time beating that price and it will hold resale value extremely well. If you don't like it you will have no problems flipping it.
They may be a bit power hungry for their rated impedances, but when you're comparing them to a Korean you're going to run below 1 ohm there's not going to be that much difference.
