I recommend you up your budget a bit (I think the quality of your electornics warrants it) and consider the Revel F206 ($3500). I've been auditioning a lot of speakers lately, and they are by far the best value I've come across.
I've heard the LS50's and they are a nice speaker, but the Revels will be a big step up and you shouldn't need a sub.
I've heard the LS50's and they are a nice speaker, but the Revels will be a big step up and you shouldn't need a sub.