I bought the Sansa Clip+, Clip Zip and Fuze+ and earlier this evening I Rockboxed Fuze+ as last of the 3.
I have spent most time with the Zip but I have the feeling the Fuze+ doesn't sound half as good as the Zip/Clip+. I mostly miss bass but overall the SQ seems less. Is it me or do more people experience that?
I have to admit, esp. with Rockbox, the capacitive buttons don't work half as bad as on, let's say, my Colorfly C3. I would even go so far as saying they work quite good (as far as capacitive buttons go). I would go for real buttons anytime though.
The Zip is still my favorite, with the Clip+ as a close second. Lovely little gadgets they are.