Polk SDA 1Cs; I like the all black studio version. I still use these speakers in my main rig, albeit with Polk's upgraded RD0194-1 tweeters, a DIY AI-1 interface, new tweeter protection devices, and Walker SST on all the internal contacts. A crossover upgrade is in the offing. Feed these speakers plenty of current from a quality amp; mine thrive on a pair of Odyssey Extreme Mono amps. Very good detail retrieval and frequency response, great soundstage and imaging. A minor nit is that speaker placement should be according to Polk's specifications, which may not work with all desired applications. WAF may not be high due to speaker size and placement requirements.