I try to only use Genelec. 70% of my spec use Genelec in the quote. If you have a budget to meet that include Genelec, consider yourself lucky. You have the choice of using RCA connector or XLR connector. Make sure to rough in for 120vac as each speaker has it's own amp. Which makes for a great look when you use the right Digital Audio Processor.
BNC
DON'T BE FRUSTRATED, GET INTEGRATED! (From a custom installer)