Chrstopher, you should be ashamed of yourself. Poor young Marko, who is, I think, still in high school, laments his lack of resources fairly often. The kid isn't rich and he seems to be perpetually broke too.
Marko, do you want to carry two different sets of lenses and a pair (at least) of bodies around? If you do, then I'll relinquish my position as APUG's village idiot to you.
Marko, when I was much younger I bought me a Nikkormat and, as I could, lenses to fit it. In 35 mm, there I am and there I will be. My Nikons (now I have a couple and my wife has one, it came as part of her dowry) still work, the lenses I bought for them back when are still just fine. I've saved a lot of money and even more effort by not whoring around after foul unclean alien mount systems.
Similarly, in 2x3 for me Graphics are it. They still work, so do the lenses I've accumulated for 'em.
Now, Marko, consider that evil tempter Christopher. The man has so much incompatible junk that he can't carry it all or use bits of this and bobs of that together as needed. I don't think you should use him as a model.
Simplification is a sound strategy. If you must go AF Canon, do it and jettison your Pentax gear. Since I see auto-everything cameras as inventions of the devil, I believe that you should stick with all manual. The next step after auto everything is digital.
Good luck, have fun,
Dan