I am glad that you are happy with the K-x
if you want to print large, consider shooting panorama-style
I have a portrait orientation picture of a historical city centre (resized here:
https://picasaweb.google.com/lh/photo/ruCVrY9QIGiXdVRnYMJfp5iJiFNzIh6LoVl1fD...eat=directlink), shot three pics at 35mm with kit lens, the size of output picture is 3600x5240 and I have it printed on 4 sheets of A3 paper (180g/m2) and...it is AWESOME
I could shoot at 18 mm but the kit lens is sharpest at 35 mm with no distortion...and I also wanted to keep that 35mm-ish perspective