which would you choose and why? (strictly body, unless you have lens preference as well) i was thinking of purchasing a friend's hardly used D200 for $500 (less then a few hundred clicks) or a brand new T2i for $799, but i can decide which is worth more.. an old professional 10mp or new mid-grade 18mp? i have analyzed all the specs and they each have a few great points for what they are.. more pixels in the T2i but better sensor in the D200.. etc. it will be my first DSLR. i take pictures of everything: landscape, nature, sports, and will now try portraits. any advice would be helpful. thank you.