Alright Mattwe, let me tell you a thing or two about Pentax.
First they are not on the bubble, no matter what anyone else may say. They are partnered with Samsung in DSLR production, they were recently purchased by Hoya (who makes the lions share of lens blanks out there. yes even Nikon's) and they have been around since the 50's. They came late to the DSLR game, but have never been behind the eight ball so to speak.
Pentax is going to announce a new lineup in January, meaning that Hoya has no plans of liquidating them after purchase. The deal went through in the summer and any new releases would have been nixed if they were going to disband the company. Hoya has stated a strong commitment to improving the brand and allowing them to become more competitive.
Their main issue has always been supply levels, many find it near impossible to locate Pro-glass for Pentax since they haven't made any since I think 2003. That's changing now, the new DA* lineup is their weather sealed professional line of lenses and they (with the help of Hoya) will make them widely available.
You will not find another DSLR anywhere on the market with the feature set of the K10D for even a near equivalent price. It's just not going to happen. Pentax engineers think of everything, they even made the camera able to record RAW images as DNG just incase Adobe was slow in supporting their RAW file type (PEF). This way no matter what happens, your Adobe image editing software will forever be compatible with the K10D, unless Adobe abandons their own file format. In which case you can shoot PEF and use the Pentax software to edit and convert.
You stated that you wanted a 50 mm-ish prime lens. Go to
www.popphoto.com and read their review of the FA 50mm F/1.4, you will be glad to know that this lens is in the running for the best 50mm ever created and it can often be had for less than $200. I own it and it almost never comes off the camera, it's that good.
Pentax is not going anywhere, they've recieved just about every single DSLR award they could with the K10D. American Photo gave it the camera of the year award. And PentaxSLR.com will have a list of the other awards it has won. They have sold more than they ever expected to sell of this camera, and that's only going to make them stronger.
Give it some very serious consideration, it beats the D80 and competes very respectfully with the D200 and for less than half the price.
You can get it for about $640 at adorama.com right now.
SLC