Repdetect since you are using both, which do you prefer? I like the looks of the Adivas better as the SS spheres match my 3.1 SS. But for the same price, overkill is better. I would rather be oversatisfied than wanting.
Dues offer a sound I like better than the A'divas, mainly because of the Kynar tweeter. Not to dismiss the A'Divas, I could live with them instead of the Dues if I had to, especially for movies. But the Dues cast a better soundstage, especially for 2 channel listening. If you listen to material with hi-res info in the rears, then the Dues might be a bit better, but for movies I believe the money spent on Dues would be better spent elsewhere. As much as I like the sound of the A'Divas, they aren't as fast as the Dues because of the Kynar tweeter, it sounds like an electrostatic, which means great transient response. But if you can get used Dues for a price close to the adiva's, go for it, you won't be disappointed with the sound. They would be a better investment in the long run. Whichever way you go, it seems you can't really go wrong.
Sony HW40 ES, Oppo BDP-103, Gallo Classico CL-4/ Classico CL-C Center/ 2-CL-10 Subs/ Classico CL-2 surrounds, Emotiva UMC-200/ XPA-5/ XPA-3, Toshiba HD-A3. Roku X, Darbee Darblet, Silver Ticket 110" White Screen "All rooms, speakers and ears are different, trust your own ears."