I did not mean to flame you. However when I say you have shown no vested interest in the questions you're asking, I mean you haven't embellished on what you want to know and are expecting everyone else to do the work for you.
For example:
"What car should I get, a Honda, Toyota, Nissan, Ford. Tell me which one you'd pick and why?"
A more involved approach would be to go and research the cameras yourself, or even read user reviews (which are abundant on the internet) and see why people did choose those cameras.
There is a lot involved in replying to such an open question of "tell me what I should buy and why", and (to me) it givest he impression that you want everyone else to do the leg-work.
I did not intend to be mean. For that I apologise.
However, to better articulate what you are after how about you answer me this:
Why did you choose to put a Canon Rebel XSi on your list?
Why did you choose to put a Sony A350 on your list?
Why did you choose to put a Pentax k200D on your list?
Why did you choose to put a Panasonic Lumix DMC-G1 on your list? (I'm pretty sure this camera has a digital viewfinder and has the same lens mount as Olympus 4/3 cameras)
Why did you choose to put an Olympus E-520 on your list?
Why did you choose to put a Nikon D60 on your list?
It seems to me that you're less concerned about what brand or model camera you want, and more concerned about whether it fits in your budget, and whether it has 10 megapixels. Of which i'm assuming all cameras do.
What you need to do is articulate what you want in a camera to a level where we can start giving you specific advice, because at the moment, all of those cameras shoot pictures, all of them have transferrable lenses, all of them are on or over 10 megapixels, all of them have fully manual mode, all of them go to ISO 1600 or higher, all of them output in RAW as well as JPEG, all of them have flash hotshoes, you see what I'm getting at?
You listed a number of cameras, said you want to shoot everything, want to print as big as you can. Then asked us which one?
My favourite colour is red, does that make red an objectively better colour? No it doesn't. Does me owning a Pentax mean that my preference for purchasing the Pentax camera makes pentax a better camera? No.
All of those cameras pretty much do exactly the same thing, exactly the same way, look almost exactly the same, have the same features, the same limits, the same resolution etc etc.
So you can buy any of them. Whichever one you choose.
What it depends on, is the lens system more than anything. Which, again, is just as open a question as your body questions. Because all company's now have a pretty good amount of lenses for all focal lengths and applications. Some (like Nikon and Pentax) have old film lenses that can still be used on their latest cameras so provide a wider choice when it comes to replacing your lenses or buying used lenses. But again, you haven't expressed any interest in knowing that.
What I'm getting at is, if you had been more specific in the first place, and done some research yourself into the cameras you want to purchase, people might be more forgiving.
However, in most cases the best response to your question is "Go and hold the cameras yourself and whichever one feels best, is the one you should go for" However I don't think this is the answer you were looking for.