my baby was a K10D with a sharp Tammy 28-75 2.8. sweeeet. needed a break, so gave it to my daughter.
then i played with a 40D and some nice glass. SOLD! so now i've got two 40Ds (i hate changing lenses), Tammy 70-200 2.8 - the 'cream' machine, 18-55 IS kit lens (freaking sharp everywhere, with great bokeh?? go figure) and a jewel of a lens, the 60 2.8 USM macro - no CA, no distortion, the match in sharpness for a 43 limited and bokeh, god, the bokeh and this thing is, well, it's perfect, everywhere - check photozone.de for their take on it as well, it makes everything 'art'.
and this is the tough bit, all lenses focus perfectly, not front, not back, but right on the money, super fast, every time. close to silently, and in any light. and they're perfectly centred.
and... the free software that comes with the cameras will correct CA, distortion and vignetting, even incorporating focus distance as well, to get dang near perfect correction.
now the 'but'... did a wedding, and my daughter backed up with the K10D and the tammy 28-75 2.8. and sh*t, her photo's colour and presence, straight out of Lightroom took some serious work to match with the 40D shots. had to use Contrast Colour Range in Nik Efex at 50% opacity and some brightness to get even remotely close... but it was depressing just how good the K10D did. and the K10D exposures had at least as much shadow detail available (so much for canons 14bit difference).
but... the one thing where the canon bagged the pentax. focus accuracy. shooting at ISO1600 (both cameras), in poor light, catching the bridal party leaving, there were about 30 shots each taken by the K10D and, one of the 40Ds. not one 40D shot was out of focus. the pentax on the other had got maybe 30% in focus. not user error, my daughter knows that camera better than anyone i've seen.
at this point. i'm thinking - do i get a K20D and a 31 limited? anyone else use this combo?
if i could get a guaranteed sharp, not front/back focusing, centred DA*16-50 2.8, i'd consider that instead. even though i also own DXO, i hate the CA issue, having been spoilt by lenses that just don't do CA no matter how stupid the user is.
in the end, i just miss the way the Pentax DSLR renders colours. really, really hard to put your finger on. and the prints are more film like, like an SD14 to some extent. i'd get an SD14 with a 30 1.4 Sigma lens, but ALL the Sigmas are such a lottery, that your chances of getting a sharp DA*16-50 look good. no offence to lucky sigma lens owners. but once you've bought four copies each, of two different expensive, premium grade sigma lenses, and they ALL suck, it colours you for life.
this is what a canon renders like, and it's still not right :-(