Hi,
You don't say whether they have to be a monitor or floor-standing speaker, but if you love Dynaudio, why not stick with them, and just go up the line? I was a B&W owner and fan, until I heard tha Dynaudio Contour 3.4's, and thought to myself, these are the smoothest, sweetest sounding speakers I have ever heard. I wound up buying a demo pair of Contour 5.4's, and I'm crazy about them. I have built my system around them, and there seems to be no limit in the quality of sound they are able to deliver. As the supporting hardware gets better, so does what I am hearing from the Dyna's. That's where I'm at, and you could get a thousand different answers, and all of them right for the right person. I'm staying with what's making me happy.
If they have to be stand-mounted, get the Special 25's, or the C-1's, both great speakers. It is fun to try something new, so have fun if you're shopping!
Regards,
Dan