I really ended up liking the lighter T case, though it did take a bit of getting used to after the metal 300/350. Mine was shiny red, and I love the finish now. You can always get a skin for it
I think I used the older Reader Library to make collections on my T1, after the Reader software choking on it and then getting a finger cramp adding them manually on the device. It took a while for the db to refresh also.
I'm also using Calibre now to sideload and mange my collections, and while it took a little getting used to with all its capabilities, I really do like it a lot more. I have it set to use the tags to make collections, though you can have it make separate Series collections if you use the Series column too.
I think the T1 is the last Sony that Adobe works with, and I ended up using wifi like you did. Check out books on the Library website and then connect w/ the Reader. Just quicker and easier - got tired of fighting with ADE after the simple way it worked with my 350.
Good luck, and enjoy the new screen - it's just as pretty as the one on my AuraHD inho.