Given your givens, I'd recommend either PRS model. If the lighting thing is a deal-breaker for you, then the eBookwise is a good second choice, but you will have the flicker and it's bigger, bulkier and runs through its batteries much faster.
There are a number of good booklights identified in the Sony forum threads on that topic, so perhaps one of those will work for you -- I personally endorse the CCFL lights, they compliment e-ink very nicely.
