I'd buy a better Sony reader, limited edition or not.
I'm not saying what it has to have to make me buy it, because I don't know.
Better screen, better size/weight, more stability, and built in light could all be a decision maker. Lack of any would not be a deal breaker
I like my T1 okay although it is not as stable as the x50s and the screen is no better. But I wouldn't have bought it. Was a gift from my roomates.
Did not buy the T2 although the screen seemed slightly better.
I did buy a KObo mini because of size and price, and an Aura because I was in a self indulgent mode, and they are both nice in many ways. Once you are reading a book they work for the most part, but even there they have problems. And even the T1 is far more reliable/stable and noticeably faster (my perception and I read on both Sony and Kobo regularly) in most ways.
So I am hoping Sony comes out with something close to equivalant hardware-wise and not as annoying software-wise. Better and I would ecstatic
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Helen