Upgrade from Spica TC-60's.

I've got a pair of Spica TC-60's driven by a Classe CAP-100 which I'd like to upgrade to floor standing speakers (I think I'd really enjoy more bass). My room limits me to only 12-18 inches from the rear wall and 7 feet to the listening position (several feet to either side wall). My budget is probably $1500 used. Any recommendations. Thanks!

By the way, my listening tastes include everything from small group jazz, blues and rock, to classical and opera.