Should I stay with Pentax?

Adam Rich wrote:

Pentax is the only brand of DSLR I have ever had. I own a K100D, K-x, and a K50. Unfortunately, the K50 is dying the sad slow solenoid death, and I am debating on what to do next. I only have a handful of non-kit lenses, the Sigma 170-500mm and a Tamron AF 28-75mm f/2.8. I have been debating whether I should move to another camera system or stay with Pentax. I need to make a decision fairly soon as I am taking a big trip over thanksgiving and would like to have a good camera. I really don't have the money to spend much more than $1500. I thought I could possibly get a used K3 Mark III, or I could jump into another system's basic camera with a kit lens or two. But I figured I would ask you guys that have way more experience with these cameras than I do what you feel is the best way to go.

Do you feel that there is any aspect of photography that your Pentax kit is not capable of?

Switching is likely to be expensive (simply because you are selling into a buyers market and are probably buying into a sellecrs market). Does removing any restriction you are feeling in your photography justify that outlay?

People have produced great photographs with DSLRs and the cameras that preceded them. Those cameras are still very capable. I'm aware that, even when using outdated kit, I'm still probably the weak link - That I shoot with more modern equipment is purely a personal choice - I doubt that it is having much of an effect on my overall quality of output.