I would love to audition the Dyn's and would have done it already, but there isn't a dealer anywhere near me. The reason I didn't know if they could handle rock is because of their smallish size/output. I know my VTF-2 will help, but above all, I just want a "powerful" sound.I always find it interesting how people decide they might like a particular speaker without ever hearing it. I'm not quite sure what a "powerful" sound means to you.
One alternative would be to buy a pair of Focus 110s used. There are four sets listed on Audiogon at this moment. If you get a good price, you can audition them at your leisure and then resell them for about what you paid if they are not to your liking.
You could also call various dealers and ask if any will ship you a set new with return privileges if you don't like them.
Either way you'll be out shipping costs but that's better than paying for a new set of speakers that you can only sell for a used price.