I'm a bit late to this thread, so just some after-comments: Either one is great (T1 or 350). The T1 is silly cheap at $99. I use a 350, about a year now. I love the portability--fits fine in my front pocket and no hint of damage. The standard Sony case is great, small, opens easily, protective. The T1 looks fine, bigger screen but I feel the 350 screen is fine (having read 100+ books on it so far!). I have no need for wifi, and applaud the OP's focus. Sony Readers are great for reading books; add too much functionality and you lose focus/quality. (Look at the Kindle Fire, with lcd screen--it's an all-purpose tablet now, OK for movies and surfing, but short battery life and the screen is nowhere near as good as e-ink for pure reading.) I might pick up a spare 350 now b/c they don't make them anymore. I have PRS+, about 300 books, and no delays. Wifi isn't necessary for me--I do borrow library books, but rarely. I'm OK with wifi on the T1 b/c it apparently doesn't eat up battery life, but I still like the focused purpose of the 350. Not saying anything that hasn't been said already in this thread, I guess.
BTW, enjoy your new Reader! I'm sure you'll be reading a lot more now...