Haven't heard them directly, going by the numerous review from folks I trust.
I do have an upgrade plan in place for the 4 decade old Vandy 2Cs (alas, I don't think the Treo CT is in my future, so have to go bang for the buck route).
Next (buy 1 or 2 used Vandersteen 2wq subs - will be keeping an eye out for good deals on the interwebs) - in my mind these are a better deal than used REL T/9is overall (Vandies hit lower and have the high-pass x-overs with high level connections, also) Although RELs are prettier.
Then:
buy the Magnapan LRS
Then:
Klipsch RP600M - so I can switch between them and the maggies depending on my mood) Haven't figured out how to integrate the subs going between the 2 sets of speakers yet.
Then, if wife hasn't killed or divorced me at this point, will buy an Aegir for tweeter and mids duty and put the Pro amp on the woofers. Am looking forward to the day when this is all complete (likely a couple years) it took loads of research to come to this point.