Unfortunately the Ref 3.5's are largely undervalued because they have been paired with mid-fi components based on their original asking price.
I bought mine new in 2010. They replaced Avalon Eidolons and PMC AML1's.
I originally had them driven by Rowland mono blocks and a Wadia front end.
Currently, I use Bricasti M28 mono block power amplifiers, a Weiss Jason transport and a Berkeley Reference DAC. The cables are TARA Labs 0.3 loudspeaker cables and TARA Labs Zero Evolution interconnects.
The point in describing the associated equipment is to demonstrate just how good the Ref 3.5's really are. I have no plans to replace them.
I hope my description removes any doubts on your keeping your Ref 3.5's.