and need some subs good for it.? Whats a good sub to handle 2000 wrms? I have a Rockford Fosgate T20001BD amp and need some subs good for it. Im lookin at either 2 10"s, 2 12"s, or what i really prefer is 1 12". Im tryin not to spend more than $400 on it. I'm also capable of building a tuned...