Hi Jtucker, tyes my Cayin 17 is a really fine player offering 2 tubes per channel. I have not upgraded the tubes as i am not sure which tubes to buy in order to get better sound. I posted a topic in the tweak section but have not acted on any of the suggestions. I'm staying with the original tubes for now. I think its the best bang for the buck in cdp's.
Howver now that I've taken a good hard look at the Consonance player called Droplet, this will be my next cdp. Offers 2 tubes of a larger variety and the innerards look better than the Cayin 17's. Take a look at the Droplets guts. Really sweet. Click on one of the used listings for a photo of the guts.
btw I pd $1K for the 17 from a audiogon member located in Hong Kong. Last yr. I plan to get the Consonance used for around $1800. I think its the best bang for the buck. Of course its twice+ the price of the Cayin.