Well, let me just say it's a combination of what I'm able to audition, cost, and overall value for me. I absolutely loved my Aon 3's, but I'm also relatively new to the game. When I sold them after getting my Maggie 1.7's, it didn't take long to think that I should've just kept them (not that they're better than the 1.7's, just that you never know when you'll have a need for bookshelf speakers). Anyway, being new to all of this, I wanted to expose myself to as many different speakers/components/DACs etc as possible, so I knew I wouldn't be getting the Aon's again (crazy, I know, but with limited funds, I don't mind selling and getting something else, just for the experience of hearing something else, for better or for worse...)
What sold me on the Venere's is simply the price/performance ratio (and I love their looks). The CM5's were more expensive, and certainly didn't sound any better than the Venere's. In all honesty, though, the Aon 3's sounded marginally better than either of these speakers, and cost less (but look way worse).
Let's be honest, there are many great speakers in the $1200 range, and I'm sure there are plenty of other speakers out there at this price that would make me just as happy as the Venere's. Very few of us have actually heard even 10% of the speakers available in this range (or any range), let alone heard them in a direct A/B comparison. I won't pretend to give you whatever minor differences I thought I heard in these that made them any better than the CM5's (I already attempted that in my previous post), but I will say that vs. Audioengine and the Paradigms, they just sound better. That wall of sound that I love so much with near-field listening is taller, wider, deeper, and more alive with the Venere's. In my home, those powered monitors make me grin when i hear them. The Venere's make me smile. I'm sure the CM5's would've done the same, just as the Aon 3's did the same.
Compared to something like the Def Tech StudioMonitor 450 or the new 65, the sound isn't worth $900 to me. The high end is just too harsh with the Def Tech's, and I found gaps in the frequencies (yes, even on the new StudioMonitor 65's). But this is all relative. Going from near-field with the Venere 1.5's, and then moving to my Maggie 1.7's, it's no contest (nor would I expect it to be).
Bottom line, I like the Venere's because they sounded great to me, they looked better and cost less than the competition that was available to me, and they weren't a speaker that I've owned before.