ImcLoud isn't very active anymore.
I can tell you that you will want PA style speakers, and you will need to have a way to mount them high. These aren't the kind of speakers you want to mount at ear level. If you want big bass, you will want a PA style subwoofer. Some very good brands for these things are JBL, QSC, Electrvoice, Mackie, among others. If I were you, I would pay a pro-audio store a visit, like a nearby Guitar Center or somewhere like that. They will be able to offer you some suggestions.