Thanks all for your comments.
For a studio, I don't need hi ISO, WR, fps etc. That's why a dedicated studio camera can be pretty much anything.
Originally posted by GlennG , it sounds like you may want the camera to allow you to expand into other markets
Glenn is right. For example, I was recently hired to photograph a school dance performance. Dark theater, no flash allowed and fast moving dancers. I thought my tripod and 50mm f1.4 would save me, only to find out that anything below f2.8 had useless DOF and anything below 1/80s too much motion blur. Hi ISO is the only way here. I managed some good shots at ISO800, so I think 1 or 2 more stops (3200) would be good, keeping in mind parents are ordering prints, sometimes up to 11x14. (I offer up to 20x30 for studio shots). I'm also finding myself doing more exterior shots. WR is more than just rain. The beach is very popular here for exterior portraits and apart from the business side, my passion has always been motorsports.
From what I'm seeing, hearing and reading, (and this is mind boggling) it seems to me that while the Kx has the hi ISO advantage, the K20 makes up for that difference in additional features. Can the K20 produce decent results at 3200? My biggest problem is not been able to try them. Not a single dealer or even pentaxians nearby where I can try them. The closest is a pentaxian friend with a K20 and K7 about a 90 minute drive. It would be a leap of faith, just like I did with my K100D Super a few yeard ago.
Of course is a crazy parent orders $1,000 worth of prints, I'd order a K5 in a hurry
Thanks all for your responses! Keep them coming!
Regards,