Looking for a tube preamp with remote control.

Simple set up. Two additional short I/C's to and from tape out/in and plug it in. When you want to use it you just switch to 'tape in'. If you want to hear it without the remote you simply switch back to 'source'. FWIW I used a Placette which is a high quality one at a moderate price. When you can find one used it sells for about $600 +/-. There are different models but the one you would want is a single source unit. (They also make a unit which allows 3 sources and they have an active unit as well (very expensive).

Here ya go!
http://www.rogueaudio.com/Products_RP1.htm

If you like the CJ sound, why not wait for a good used one to show up on USAM &/or Agon? As to the passive preamps, I have seen too many people who have tried it go back to a regular active preamp. 

The Rogue headphone amp RH-5 is also a full-function preamp with balanced and unbalanced input and output, tubes, remote control, etc.  An optional phono module brings the total price to just under 3K.  Some prefer it to Rogue's more expensive offerings.

Your Cambridge streamer appears to offer volume control like the BluOS product I use.  Just set the volume control on your preamp to to the maximum volume you are likely to listen to with the volume on the streamer at maximum.  After establishing that value, use the streamer volume app to attenuate the volume to your preferred level.