Originally Posted by Mike Cash 
You seem to be operating on the assumption that just because the K100D has scene modes all users of K100D must be using them and are incapable of shooting in Av, Tv, or manual.
Some of us manage to shoot in Av, Tv, or even manual just fine without what you have very accurate (but probably unintentionally) labeled the "extra" wheel. Just because we only have one wheel doesn't mean we can't (or don't) manage to set our shutter speeds and/or apertures just fine anyway.
Actually not true at all. But the person I was replying to seemed to think that because the K200D had scene modes and the K10D didn't, that it was easier to use the K200D. As to the second wheel, of course you don't need it, but having had one, I don't think I'd ever not have one again, and most agree with that. It seems a far more useful feature than any scene mode. Given that overall the K200D offers nothing more than the K10D, the K10D still looks like the best bang for the buck between the two.