IMO I'd use 0 gauge, then either trim it at the amp or put a distro block VERY close to amp to step it down to 4. If you decide to use a bigger amp later then you already have your wire and wouldnt have to buy more stuff saving you $ in the long run, plus your wire can never be too big, or @ least thats what she said muhahahaha. seriously tho when it comes to wire there is no such thing as over kill I knew that there is no overkill with wire but I wasn't thinking completely. Thank you on the reassurance and the mentioning of a bigger amp later on I totally didn't think about that . Plus, that is very valid, wire it once so I don't have to do it again . Thanks again for the quick response!