Alright I currently have a single SA12 D4 on a RF 500.1 @ 2 ohms with 8 ga wire in a custom box. I'm going to upgrade to a SA12 D2 to run @ 1 ohm along with 4 ga wire. I need an amp that will be good, but not too too expensive that can push the SA12 to what it can take. I was thinking the...