I have the Il Cremonese and I think that’s your best bang for the buck. I upgraded from SF Serafino- outstanding in its own right- and the difference is substantial. Initially planned to go with the Amati which is a great speaker but moving up to the Il Cremonese was a big jump
the DCS is a great piece of gear but I think you will get the biggest jump with the speakers and could get a very big step up in performance from the Cambridge for much less investment than Rossini