Rogue audio amp thoughts

I am looking to upgrade my power section from Cambridge 640A to go with Rega Dac R and Tyler Taylo monitors.  I have listened to and am interested in Rogue, and after hearing the Cronus with the Tyler’s, realized I probably wouldn’t be fully satisfied with the Sphinx long term, but couldn’t replace with an all tube integrated or separates all at once.  I can use the pre section of Cambridge with a different power amp but not vice versa.  Would I be better off getting a Sphinx first And later getting a tube power (Atlas/ Stereo 90) later and use the Sphinx pre section, or pick up one of the above mentioned power amps first and use pre section of Cambridge until I can get a stand alone pre amp further down the road?  Thanks for any thoughts!