If I were in your shoes I would go back to the Coda for the following reasons:
1) Since this is your retirement system, it's probably time to get off of the "upgrade merry-go-round."
2) "Peace of mind;" you know and like how the Coda sounds.
3) The Coda is a great amp.
4) Coda amps rarely come up on the resale market (see # 3); plus, it sounds like you were the original owner of the CSiB. If that is the case, then that provides you with another layer of peace of mind.
Good luck in your search and enjoy your retirement!