Klipsch Refernce Series Bookshelf

I am considering getting new bookshelf speakers for our 2-channel system which is in a mid sized room. Currently we have Altec Lansing 101 bookshelf speakers. We listen to a broad mix but alot of our music is Rock and Blues oriented but we are starting to listen to more Jazz and Classical. I am wondering if the Klipsch Reference speakers are an option for a music 1st system. Our budget is $500 or less. What other options might be worthwhile?