With minimal use, the preamp is sounding great. I'm sure once the caps break in the preamp will improve. Having used Clarity MR caps in the past I knew I wanted to use them with this project. From what I can tell I think I made a good choice. I like the fact the SP14 can use two different output caps. I may try some Mundorf S/O in the other position or perhaps some of the more expensive caps if I fall into some cash.
I'll post my listening impressions once I put more time on the SP14. So far I couldn't be more pleased.