Nope, sorry. Can't say I'm unhappy with my recent "upgrade" at all. I really liked my *ist while it lasted, but my K-x still beats it hands down. I honestly can't ever imagine trading this camera in. The K-x is a terrific camera. I'd rather keep it as a second body even when I can finally afford a K-5 or the later equivalent thereof.
I know the K-r is supposedly a bit better, but actually I like the K-x better. I've finally seen a K-r and I didn't think it was quite so elegant actually. It's a bit boxy compared to a K-x and I think I actually prefer the K-x to the K-r. So is the K-5 but for that kind of "upgrade" I guess I'd have to deal with it.
Probably I will upgrade at some point a few years down the road as I am going pro but I'm in no great hurry now that I have the K-x. It's more than enough camera for me for now from what I can tell. I'm very comfortable with it.
That's what it's all about really. If you're not comfortable with the camera you're using after a decent interval of using it then swap it out. If a K200D is "your" camera then get another and use it. Maybe you just don't need the bells and whistles of a K5. So what? What brand you use, what camera, it's all about finding yourself the tool that fits YOU best.
We've all felt the lure of a new and supposedly better toy, and okay, maybe technically the K-5 is the superior camera for most. But maybe it's just not the best camera for you and that's perfectly okay. If everybody liked the same thing all the time there wouldn't be as many cameras digital or non digital out there. But there are and (gasp) some people they're still shooting with film cameras that are decades old because they like it and it works for them.
The camera is a tool. You're the PERSON making your pictures. The camera isn't the big deal in terms of your photography, YOU are.