I would agree with Avguygeorge if you asked my 2 cents. If I had your system I would look to be upgrading upstream before changing speakers. There is much more satisfaction to be had in taking this approach than in doing it speakers first, in my experience.
Once your upstream changes are done, you will be able to hear the differences between the speakers on your list much better.
Once your upstream changes are done, you will be able to hear the differences between the speakers on your list much better.