Very nice, clean looking set up. Interestingly, in the early 90's I had a very similar system having the CAL Icon player and Adcom 555MkII amp.driving a pair of ADS L1290's with a CJ PV-5 tube pre and Adcom ACE enhancer...I sold the 1290's for a pair of Stages that have the same finish as yours.
I also had the S300 recently to drive my Emerald Physics CS-2's, and it was a really nice sound, so am familiar with the BC's...I would think the BC's do a great job on the Stages as well, but never heard that match-up.
Your system definitely brings me back to a good place in time and a very good sounding system in my journey.
Congratulations and enjoy your fine system.
Best,
Ken