Get the Ref5se. It is quite a step up from the Ref 3. I have owned all the pieces you mention, 3 and 5, and 5se, and 110 and 150. The 5se will easily show it's benefits into a 110, which is still a great amp. But the 150 can't improve what wasn't there in the first place from the Ref3.
Which ARC reference component to upgrade?
I have the ARC Reference 3 preamp and Reference 110 amp and am considering an upgrade in the ARC line. I can't do both right now. The question is, which change (Ref 3 to Ref 5SE; Ref 110 to Ref 150) would result in the best improvement in my system?
System:
Ref 3
Ref 110
Wilson Sophia 2
Music Server to Berkeley Alpha Dac 1
Esoteric X01
FMS Nexus cables
System:
Ref 3
Ref 110
Wilson Sophia 2
Music Server to Berkeley Alpha Dac 1
Esoteric X01
FMS Nexus cables