i have a F828 & shot around 200+ shots. the bad news - purple fringing is apparent in shots containing high contrast subjects - tree branches against a bright sky, window grilles infront of bright sky & chrome reflective objects eg, metal railings against contrasty bkgrounds. the good news - its NOT a big issue unless you shoot window grilles/trees for a living. this can be removed via software but it doesnt happen all the time, but its there if you want to be picky in the situations listed below. under normal shooting conditions, it IS capable of producing great photos, with post-editing (Photoshop) - very high quality images. its well-known that the F828 got its fans mainly from its following features :
- mechanical rotating (SLR-like) zoom/focusing ring
- f/2.0 - f/2.8 max aperture (the Carl Zeiss T* designation helps - psy)
- rock solid magnesium alloy pro build & "the look"
- 640 x 480 30 fps video recording (recording time limited to size of memcard)
(altho u need a Microdrive CF or hi-end MemStick Pro card)
but if image quality is more important to you than the above, then go for the Nikon 8700 but do bear in mind that its widest zoom is 35mm altho you gain at the longest zoom (280mm if im not wrong). in fact if image quality is top priority the Olympus CZ8080 is a better bet (altho you lose out in its maximum 140mm telezoom). in short, the F828 is capable of excellent results if you make an effort to do post-processing. if you hate that, i do not recommend it for you.
i myself am very proud of it becos im very happy with most of my prints. if the above 4 Pros is enough to win you over and close one eye to the purple fringing (noise too but its not as bad as you think becos even the other 8MP digicams have them to a certain degree), you won't regret it. at the end of the day its all abt compromises and your personal (priority) needs. you'll have to make a decision based on your own preference & needs. as they say, one man's meat is another man's poison. hope this helps. Cheers!