I dont know my first, but it was definetly a WOW moment was when I finally got my home theater all setup, I already tried 3 different setups {all got returned}, and listened to at least 20 different ones across 3 states {I live in CT 2 minutes from Ma and RI
}. And when I hooked up my 340se front stage with the EMO amp and HSU sub, I was amazed they were just what I wanted warm and defined, and the bass was HUGE, just overpowering and DEEP Rumbles with no Boomy echo... Then it took a few days to hang the 200se surrounds, and finish the balancing and crossing. but now that it is done, its impressive for sure, I dont think you can build a better HT sound system for twice its price...
That system has already supplied at least 4 others with their first WOW moments. I play the movie Drive for everyone that wants to hear the system, I FF to the part where the little kids father gets shot, turn it up to 65 {which is just insane volume}, but all you can hear is the motor of the car rumbling which is around 75db, then the door opens , guy walks out, and then the first shot, EVERYONE jumps, it measures like 105db on the meter in the kitchen!!! Then the chase seen after that has pretty good sound effects too... But after hearing that my brother in law, uncle, and a few friends have went and got systems..
As for music systems I have had them for years, it takes alot to wow me, because I have been to so many concerts and heard more than my share of private performances, so not many things compare to the real thing... Plus I play guitar and I haven't heard many speakers that sound like when you are holding it in your hands.. CLOSE, but not it..