Upgrading from Martin Logan SL3s

I am thinking of maybe replacing my Martin Logan SL3s. I have had them since 1997 and wondering if it is time to upgrade. If you had Martin Logan speakers and upgraded, to what did you upgrade? Maggie's and Vandersteen's are not really an option for me. The rest of my system is

ARC Ref 110
ARC LS25 mk2
ARC Ref CD7