I've taken more wonderful pictures with my K100 than I can possible count.
Every one on my web site was taken on it, if you'd like to see for yourself
One of the many good things about Pentax is you can use just about any lens ever made for a Pentax on the new cameras. So this can make your future expenses muuch lower buying used lenses.
You do need adapters for some lenses though, if you ever have a doubt ask on here and someone will tell you.