Well that looks like a well rounded starter package but it has a lot of stuff which isn't necessary and I don't care for much of the necessary stuff.
The camera body (Xsi) is great.
The Canon 50mm f/1.8 is an excellent value lens
The Tamron 28-80mm and 75-300mm lenses are not so great (okay really not so great).
The "Wide Angle Lens" and "2x Telephoto lens" are even worse than the Tamrons. I don't want to use the word "worthless", but you get the idea. I would put the "digital flash" in the "not so great" category as well.
It gives you 2x 8 gig SD cards, but one 4 gig gives me over 350 RAW images. The basic point is 2x 8 gig SD cards are way overkill. Your battery will run out long before you use up those cards.
The "SLR Large Case" looks great. The Hard Shell case looks like a waste of money.
You shouldn't need a tutorial CD, the manual included with the camera is excellent.
The three piece filter kit is trash IMO, as are the two UV filters.
The "Multi Section Tripod" and "Mini Travel Tripod" aren't worth the effort IMO.
I don't know why you need a USB card reader when just plugging your camera directly into the computer is less effort than taking the memory card out of the camera, plugging the memory card into a thumb drive, and plugging the thumb drive into the computer, off loading the images, and putting the memory card back in your camera. It seems like a good way to get a lot of wear and tear on the memory card and the camera's female port which could easily be avoided. Never mind the excess hassle of using it.
A memory card wallet? Why do you have a camera bag? It should have a built in memory card pouch.
The LCD screen protectors are a waste of money. Just wipe the screen off with the inside of your shirt. The plastic on the back is very durable and, after a couple of years if it gets scratched, you can easily replace it for less money than 2 years worth of screen protectors.
The lens cleaning kit looks good. Of course I spend about $2 a year buying my cleaning kits from a mom and pop camera shop.
The lens cap holder looks like it would just get in the way. Place the lens cap in you camera bag and replace it when you put the lens away. You have to screw another cap on the back of the lens anyway at this time. When the camera is around you neck, you shouldn't be using a lens cap anyway.
The strap, charger, battery, USB cable (plug the camera directly into the computer), Video cable, and Canon software are useful but they come with the camera anyway regardless of who you buy it from. I don't care for the Rebel strap though.
I say you go to B&H and get a XSi, 50mm f/1.8, 100mm f/2.8 Macro, and a nice tripod for your macro work. You would spend a couple hundred more than this mostly worthless filler $1000 kit and be better for it.