Best $500 speakers for Home theater only?

I am thinking about splitting up my combined ht/2 ch system. What would be a cheap pair to use in the ht only rig? I will be using them without a center channel. I have a Velodyn dd15 sub to supplement. Amp is 150wpc b&k.
It's for ht! How good do the speakers have to be?? They will be crossed over at 80hz.
I am planning on getting their new processor, so maybe that would be a good match. Thanks for the replies!
Only problem with bookshelf is you have to get stands that would prolly cost as much as the speakers!
For home theater, given that you already have a high-output sub, seems like high output mains are called for. Maybe Klipsch Chorus.