SaleenS7TT

Hello, I have an older Denon AVR-X2300W 7.2 with an older Klipsch Reference R-25C center channel and R-12SW sub and really old, cheap Yamaha speakers ha. I would like to upgrade the surround sound speakers. What would match best with my current receiver and Klipsch speakers to build a 7.1 or 7.2 setup? Also, which speaker wire would be best? I do have cats that love to chew on rubber sadly. The last part I would add would be the second sub. Thanks for any input!