if ur gonna run just the 1 sub... then any 4 channel amp will be suitable, say kicker, alpine, pioneer or what ever. If you plan on running 2 subs, than a mono block will be your best bet... again ne of the above brands off a decent range.

however i recommend running your speakers off an amp aswell to get the clarity and power that they are meant to be run at, but i also suggest not using subs and 6x9's coz you get bass cancellation, which will just sound shithouse.

Go in and speak to someone at your local car audio shop, they will be happy to offer you advise.