For me the tools to create quality ePUBs exist. With BookCreator and calibre it's just as easy to enough to produce books just as good as LRF and in some cases even better. (Mobi and IMP require more work) But the ePUB support on SONY is just terrible. LRF performance on the SONY is just far better than ePUB.
Just a comment there are other mobile devices today that support ePUB such as the iPhone so I don't think one of your options is incorrect.
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