If you are on a budget and are considering the 600d I would seriously consider the 550d which I think personally think is better value with the exception of a flip out screen.
Just my opinion. Have a look at reviews titled 600d vs 550d or whichever camera you are considering.
As said above there are no bad dslr's in the range you are looking at and I went through the same process. I didn't think the flip out screen was a big enough benefit to warrant the extra spend.
Canon 550D, Canon EFS 17-85 IS USM, Canon EF 75-300 IS USM, Canon EFS 10-22mm USM, Canon EF35mm F2.
Got some of the gear but really still no idea...