Vintage speaker suggestions

Set up: 2 McIntosh Mc2120 solid state amps, C-26 pre amp, and MAC-1700 receiver.  Not changing any components other than speakers.  I have a pair of Pioneer CS 99-As and 2 pairs of Original Large Advents, neither sounded bad, but I think I could do better.  Trying to spend around 1000 or less and keep it from the same era more or less.