Hi everyone, I will hopefully be installing a multiroom sytem in a friend's house and, as I am hoping on setting up a custom installation business, it needs to go smoothly! I think the opus system looks the most suitable but I have a few questions. 1) Can the keypads (WCU500) be placed in swimming pool areas? 2) Will the DZM 20 Amp be powerful enough for 4 Linn Sweetspots? 3) Can normal CAT5e cable be run between the amp and the keypad or does it need to be the BTC1 cable supplied by Opus? 4) Will 2 QED Arias speakers connected to the DZM 20 be sufficient in an indoor swimming pool area or will I need more power or more speakers or both? Any advice anyone can offer me will be great!