Hi!
I'm the one on the other discussions posted by GlennT.
It's Electrovoice and not "Electrovox" as you wrote.
About the SXA360s, I ended up buying them because I like to travel as light as possible!

But it wasn't just that... They are very very powerfull and at the same time very light.
I love the sound quality with my Ketron SD1 and my partner voice, who is a female. I'd like to have the EV Sub on addition to the SXA360s, but since really I don't want to carry it every week, the SXA360 can handle it by their own! They are so powerfull I have been using them with the volume setting at -6 / -10 dB.
I've never compared the EVs to the PAS or even the Barbetas, so I can't help you here. About the Mackies SRM450, I heard about some overheating problems on this model and that's why I didn't even check them. The EVs SXA360 are ligher and more powerful so...

If you want to know something else about the EVs send me a email!
(Sorry about my english, but I'm from Portugal!...)
Luis Santos