Good choice on the camera, not so sure on the package...
Seems like a whole lot of stuff, but do you need it to start?
If you are on a tighter budget, start with the Rebel + kitlense and buy a Sigma 70-300 mm APO DG Macro. It's the best of the budget telelenses. Look for the one with a red ring around the top of the lens. I'm afraid that the one in the ebay package will be an older version, so lesser quality.
I did a quick search on the web and didn't find any reviews on the Sigma 28-70 f2.8-4
The flash seems to be a white product, no brand. Looks really cheap and weak, better use the build in flash for starters.
The attach wideangle lens is something I haven't seen before, but will probably cost you sharpness and lightstops on the lens you are using. Same goes for the filters. Only highend filters don't affect the image-quality. Putting more glass in front of a lens results in a higher chance of lensflare and reduced detail and sharpness.
Generally I wouldn't recommend buying lenses and camera's of the web. You can always go back to a store where you buyed the gear when womething goes wrong. Trough the internet it will take a whole lot more time...
My advice? Check out you local stores, the camera is good, but start with what you really need and you'll soon find out what othet stuff you need, so you can buy as needed.
I know that the dollar is cheap compared to the Euro, but for that amount of cash you can't buy all that stuff in a reasonable quality, IMHO...
ps: read - read - read before you buy... it will save you disappointment and cash.
Some sites:
Camera's: -
www.dpreview.com -
www.cameralabs.com -
www.the-digital-picture.com/ReviewsLenses: -
www.photozone.de -
www.fredmiranda.com -
www.photographyreview.com