Powered speakers for basement system?

I'm looking for some accurate powered monitors that play very loud, something simple, such as The M audio studiophile AV30. I like this speaker a lot but it just doesn't play loud enough. It needs to have easy ipod / mp3 player connectivity. Also I need a set of speakers that I am able to connect a powered subwoofer to.
I use the Behringer B203IA Truth active monitors,less than $400.00 dollars with a Jbl Prx518s sub that should play as loud as you need.
Try the new Emotiva Airmotive6(200watts) or the smaller ones in the line. Plays loud and crystal clear.