Not much response, so I thought I'd throw in my limited knowledge. I own a a pair of the latest Merlin VSM-M's with the latest tweaks. Can't say enough good stuff. Obviously the Merlins will show off all your equipment either good or bad. Don't clean the window if you don't want to see the view. If you have components up to it, the Merlins can give you world class imaging, clarity and detail. I use all VAC amplification and love the synergy with the Merlins. Just an incredibly emotional, sexy sound that is truly addictive.
I considered the Aerial 10 and 7B, but ultimately didn't get to hear them. They were a little big and heavy for my tastes. My impression is that both of these models are near SOTA and can deliver excellent sound. The 9's are probably quite awesome as well. I'd expect the Aerial to have better low end, but the Merlins to ultimately have a more refined sound. Just my two cents.