Bonjour FZ6guti,
Welcome to the Pentax world

I'm a former owner of an *ist DL and a happy owner of a K10D. I reviewed it
here.
From my point of view, main differences are
- sensor: 6 M pixels for the K100D super and 10 M pixels for the K10D,
- batteries: standard or rechargeable AA for the K100D super and specific rechargeable battery for the K10D (between USD 25~50 a pop),
- viewfinder: pentamirror for the K100D and pentaprism for the K10D, which provides more light,
- weight and size: K100D is lighter than the K10D.
Answering to your questions,
1- phantom pixels I haven't experienced so far this problem on my K10D
2- miss-alignmentMy K10D suffered from miss-alignement

but I got it fixed by Pentax. Here is my full report
Twisted Pictures On K10D?.
3- full RGB histogramActually, I never used that feature. Please note that the histogram isn't live but only on pictures previously taken. In my sense, shooting in RAW (or in JPEG + RAW) with post-processing on a computer is far more important.
4- a couple of suggestionsMay I do a couple of suggestions

- A new generation is rumoured and planned to be announced end of January 2008, with K200D and
K20D. If you could wait and you aren't in a X-mas hurry, I suggest you tto wait for the announcement so you could benefit from bargain prices on the K10D. - Another strong point are lenses: the new DA* line is more expensive but provides just terrific quality. See
Pentax DA* 16-50mm f2.8 ED/AL (IF) SDM and Pentax DA* 50-135mm f2.8 ED (IF) SDM . They are compatible for both the K100D and K10D.
I really enjoy the K10D, which provides same quality as a film camera. Nice to hear from you and your final choice

_________________
--- rei_vilo
Pentax K-5 + BG4 + DA* 16-50 + DA* 50-135 + DA* 60-250 + AF-540FGZ
reivilophotography.weebly.com