Without a doubt, for me it has to be having a McCormack DNA-0.5 amp upgraded by Steve McCormack (SMc Audio) to their Revision A-Gold. This amp will easily compete with amps in the the $5000.-$10,000. range, and total cost (assumming new purchase of a 0.5) was $3100.-3200.
The other item that really makes my system "sing" is NOS 6922 Sovtek tubes (w/Hal-O tube dampers) in my Line 2SE pre-amp-- and at $25. ea., they're inexpensive! Cheers. Craig
The other item that really makes my system "sing" is NOS 6922 Sovtek tubes (w/Hal-O tube dampers) in my Line 2SE pre-amp-- and at $25. ea., they're inexpensive! Cheers. Craig