Sounds like the makings of a good system to me, although I would make every effort to demo before investing.
The Bryston combo are well matched, even though I have a suspicion that the BP26 preamp can be bettered at RRP it does go well with the matching power amp, especially if you want to retain the aesthetics of an all Bryston faceplate.
You already have Focal speakers so I presume by upgrading you want to retain the character you already like but just get more from them. I agree with comments above, I haven't heard speakers that don't benefit from the drive that the high current Bryston power amp can provide, and more importantly the 4B never tries to force the issue - it's like the difference between a V8 engine just ticking over with plenty to spare versus a tuned 1.8i being revved hard!
As for your transport the new Cyrus XTSE gets very good reviews and in your proposed configuration would not by virtue of its functionality, impart the trademark Cyrus character, which to my ears is not the best of matches with Focal but hey we all hear things slightly differently don't we. In fact unless you are wedded to the Cyrus you could look at a range of transports that would do a job without sacrificing the overall quality of sound that your set up would produce - I'd argue that the transport has the least impact of all the components on overall sonic character. As above if you can find one at a good price the Bryston CD player would complete the look of your system very nicely.
Remember to come back and give us a full review!
Michell Gyrodec SE - Mac Mini Chord QBD76 - Music First Silver - Bryston 4BSSTC - ATC SCM40