For now, I mean.. Run what you have and make the best of it for now. At the least.. Build a DIY enclosure for that one sub and tuned and set those gains properly on that amp and run it. Sit down.. do some research..make a list of what you want to do with that car, and make a budget/max fund build.and get some gear you know will serve well and add to it.What Id do.Get that Big 3 done min as well and run what you have till then.Thats me.. Id rather spend some $ on an enclosure for that one sub at the moment