Mike,
I'm not familiar with the exact models but I've owned a few Proacs and Dynaudios and personally I think you will be disappointed with the sound of either with the amp you have. They both need good quality power to sound good. I have been blown away at how good a set of Audience 42s sound hooked to a Creek Destiny integrated but they didn't sound so hot with a couple of other lesser integrateds I tried. Who knows maybe you will be happy with whatever you get with your current amp, hopefully. My vote would be for Dynaudio.
I'm not familiar with the exact models but I've owned a few Proacs and Dynaudios and personally I think you will be disappointed with the sound of either with the amp you have. They both need good quality power to sound good. I have been blown away at how good a set of Audience 42s sound hooked to a Creek Destiny integrated but they didn't sound so hot with a couple of other lesser integrateds I tried. Who knows maybe you will be happy with whatever you get with your current amp, hopefully. My vote would be for Dynaudio.