My opinion is you won't really know what you did if you do it all at once. The two tire changes -- larger rear and smaller front -- will drastically change things including shock sag. You're a flat lander most of the time so set the bike up how you want. But if you're spending 90% of your time on flat roads I would work on tire details first.
Change the front Metzler and throw it on the burn pile. Now you just made a weight transfer. Take her out and you'll feel the difference. Then once the Meztler goes out in the back, put the Bridgestone on. Feel the weight shift more to the front. (You will feel this even on flat roads) Try going fast. STOP if you feel the death wobble at high speeds (you will maybe see this at 140ish or so as the front end is diving more from wind pressures). After that you can decide do I need taller shocks or just a good set that are adjustable. Now of course this will not help long distance ride comfort. But keeping a spare front tire on hand of normal size will be good backup, as well as an extra rear with the new long wearing cobra chrome. Just my opinion!!! Have fun -- the corn is not too tall so you can observe things farther out if you're running up in the dead zone.