Originally posted by jhc403 While it feels well built I am not happy with the results I get it take no better pictures than my with my KX. In low light it is better than the KX.
I'm sorry to hear you're disappointed, however I'd politely disagree
I moved to a K3 from a K-r (essentially the same as a K-x with only minor differences that are unrelated to image quality) and the K3
does take better images - from a technical perspective, that is.
First of all, there are numerous advantages that are unrelated to image quality but still help you to take better pictures. Vastly superior AF module, more direct controls (second control dial etc.), weather sealing, more precise metering, convenient functions (automated exposure bracketing, time lapse etc.) and so on.
Now let's have a look at image quality. If you go outside on a sunny day, take pretty much any modern camera (compact, APS-C, FF, whatever), randomly aim it at something and take a picture you will see little differences, because a bright, evenly lit scene is no challenge. It's challenging conditions where better cameras shine.
1) As you mentioned yourself, the K3 has better low-light performance than the K-x. Set both of them to ISO 3200, take identical pictures and the K3 will show significantly less noise.
2) Another aspect where the K3 excels is dynamic range. Take both cameras, take a picture each of a landscape on a bright day (exposing for the sky/highlights), then pull up the shadows in PP and compare the results. There will be less noise and less loss of details with the K3.
3) The K3 also produces more detailed images. Take both cameras, mount a decent lens and use it at its sweet spot and the K3 will deliver sharper/more detailed results, thanks to its higher resolution (24 MP vs. 12 MP) and lack of an AA filter.
That's three important fields in which the K3 trounces the K-x. If you didn't notice these advantages after you upgraded, chances are none of them matters for your shooting style (you don't shoot scenes with vast dynamic ranges, you don't shoot in dark places, you never crop), you don't post-process your images to get the most out of them, your lenses aren't up to scratch and take little advantage of the extra resolution or all of the above