Speaker upgrade...

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

I'd go with a pair of used Legacy Signature III's ... or if you have a large room that can accommodate the Legacy Focus speakers, then go with them.  

Double click on my avatar to get a good look at the Signature III's. 

You have given no personal listening preferences or the type of music you enjoy, size of your listening room, electronics, WAF influence or any other background information.