Hey there I saw your thread about Canon or Pentax in the art forum but it got closed before I could post my reply.
Anyway, just wanted to let you know I own the Pentax K20D and it's an incredible camera, very sturdy, weather proof, built in stabilization and is backwards compatible with every Pentax lens ever made which is great if you come across some old pentax lenses since the older lenses were of much higher build quality than what we get now.
On the Canon side the 450D and 500D are a beauty of a camera also, no matter which DSLR you get though you'll be happy, just a matter of reading through all the reviews you can and deciding which one is better for your needs.
Hope that helps