Also disregard the fanboys (and girls) who'll keep saying canon is better than nikon or nikon is better than olympus or sony or pentax etc etc. Instead list out what your priorities are (low light? speed? weather sealing? ergonomics? etc?) and read reviews on dpreview.com to find out which body is best for you.

For your viewing pleasure - Pictures taken with a Asahi Pentax Takumar lenses, older than you and me put together, bought off ebay for $50 and some change.
http://www.pentaxforums.com/forums/pentax-slr-lens-discussion/31601-taku...

I bet your neighbour with his fancy Nikon D7000 / Canon 7D can't take half as good pics as this one ;)