Speaker upgrade...

Keep the Dunlavys. You’ll regret selling them. Upgrading for the sake of upgrading results usually in disappointment. Since you like the Dunlavys and are happy with them, I will quote the Allman Brothers ... "Don't mess up a good thing."

Keep your Dunlavys until you know for sure what you want. To buy them back if you make a mistake will be very difficult.

It will be a big mistake to replace speakers you love for speakers  you can't  audition. It's a risky gamble.

If you're looking to upgrade your system in any particular area, there's absolutely no reason why you can't upgrade your electronics instead.

My advice is to hold tight until you can sit in front of a few things yourself... Your Dunlavy's have their own character.  When you listen to B&W or Legacy, A Golden Ear or Avalon,  what ever the brand may be, you will most likely hear a family resemblance.  You need a good feel of how different something else will be from your Dunlavy's. I also like the Legacy stuff, the current Signatures, Focus and Aeris are all very good speakers, but even with all of these recommendations, they may be so different from your Dunlavy's that they would be hard to get used to. 
Take your time, take a look around.  You'll come to a conclusion to replace or hold on and feel good about your decision.
Tim