You have a really nice front end. I agree, the phono stage should get upgraded first. If it were me, I would put the Jolida phono stage at the top of your list. Then consider upgrading the tubes in the Jolida.
You might look at some of the British integrated amps. Exposure 2010s2, Naim 5i, Creek 5350 are a few good ones. It will depend on your preferences, but any of these will be a big step up from the Rotel. The Simaudio Moon i1/250 is also a very good choice. All are priced below $2k new.