So I''ve been reading many different guides and comparisons, and I've finally decided on buying either the Canon EOS 1000D / Digital Rebel XS or the Canon EOS 450D / Digital Rebel XSi.I for now, I plan on getting the standard kit-lens so I can learn exactly how to use the camera the its full potential. I know some people here use these models, so I want to ask you guys for you opinions. Keep in mind I'd like to stay as close as possible to my 1000$ budjet
I'm trying to figure out what kind of package would be best for me to buy. I've found a couple here: (Canadian $)
CANON REBEL XS BLACK W/18-55 IS - $599.99
or
CANON D-REBEL XSI W/ 18-55 IS - $799.99
Also, I would like to get a IS version of some type of telephoto lens, to photograph sports (soccer and track) and also some landscapes, such as forests or sunsets. I found this package:
CANON REBEL
XS BLK W/18-55IS & 55-250IS - $899.99
If possible, I'm looking for a good "all around" lens, to try and minimize switching, but I know I won't be able to find an all-in-one.
So, is the 450D worth that extra $200? If so, why?

Any recommended Tele-photo lens?
Over all suggestions are welcome! Anything I can use to help me is greatly appreciated