Assuming you are not content, if it were me, and especially in the price range you mention, I'd simply investigate in another/better cdp or SACD/cd unit. Sometimes using XLR connections everywhere can also provide additional sonic benefit.
Thanks Stehno, the Cal SSP does not accomodate balanced connections. I had thought of going to a dedicated CD player but thought I might get a better bang for the buck going with the DAC and utilizing the Cal DVD as the transport. The last big upgrade I underwent was when I found the Aerial's on Audiogon which replaced the JM Lab 913's. There was a noticeable difference after that switch and I'm simply seeking to flush out another incremental gain in performance. The DAC's seem to have a bigger discount associated with them than CD players the same age which led me to the consideration of this tact. Hopefully if it does not deliver, I can get back 90% to 100% of the investment. Thanks for your feedback.