Yeah, for your workflow here I don't think there is any better solution, especially because of the Kindle / Goodreads integration (which Amazon will never open up to other services).

As the Fred Wilson piece I linked above notes:

I wonder if listmaking is really a vertical thing instead of a horizontal thing. That would suggest that there will be successes in verticals like food, travel, shopping, reading, film, music, etc but that each will be its own thing and not part of some meta listmaking community.

With Trove we're trying to build something closer to the "horizontal" thing, but I suspect power users of a particular vertical (e.g. "power readers" like yourself) will still flock to vertically focused and integrated solutions (like Goodreads for books).