I have a pair of Definitive Technology AW6500 speakers in my patio area. Pretty solid. I use an older 2 channel 100 watt Adcom amp to drive them, and I have a Sonos Connect connected, so they fit in with the rest of the background music house audio system. The sound is excellent for outdoor speakers. They are mounted with the supplied brackets to my house wall, which is smooth stucco over concrete. I recommend getting a 1/8" sheet of rubber, and cutting it to the size of the bracket, and installing that rubber between the speaker and the wall. Reason being, when a bass heavy song comes on, there is a vibration rattle from the bracket to wall connection. I have been meaning to do this for ages and have been lazy! But if you do it at the time of install, so much less effort.
http://www.crutchfield.com/p_735AW6500W/Definitive-Technology-AW6500-White.html
http://www.crutchfield.com/p_735AW6500W/Definitive-Technology-AW6500-White.html