Are there any reasons to not get a nikon lense with this adapter for my camera? - 1

I have a canon rebel t2i. I want to upgrade soon, but i'm leaning towards getting a nikon. Nikon lenses are excellent. Canon, so-so. I would rather buy a Nikon lense. (50mm 1.8) Are there any reasons to not get a nikon lense with this adapter (below) for my camera?
http://www.ebay.com/...0578122469
I know canon has a 1.8, reasonably priced, but it's very cheaply made.
Are there any reasons to not get a nikon lense with this adapter for my camera?

There's no generalized evidence that Nikon lenses are superior to Canon lenses. Both brands are the same. I for one find some Nikon lenses cheaply made.

If you insist on using a Nikon lens on a Canon body, you will lose automatic functions. Why not sell the body and convert to Nikon all the way instead?

Sorry, but you do not know what you are talking about. There's NO evidence that nikon lenses are generally better than canon lenses.

There's no evidence to support your claim that Nikon lenses are better than Canon lenses.

In fact, many professionals (including myself) would firmly state (non-dependent on brand loyalty) that Canon produce far better lenses and Nikon produce far better camera bodies (But the Canon 1DX and Nikon D4 are pretty much on par with each other now).
I've shot with Nikon glass before and I believe Canon have both a better range of lenses are much better glass quality in their L series lenses. However, the Nikon D3s is probably the most amazing camera I've ever had the pleasure of using.

The saying remains true for both brands though: you get what you pay for. If you buy a cheap Canon or Nikon lens then you'll get a cheap quality lens (CA, vignetting, soft corners, poor centre sharpness etc). You're not going to get better quality glass unless you actually invest money in better quality glass.

Anyway, by attaching a Nikon lens to your Canon T2i via the adapter you'll lose in camera metering, autofocus and autofocus confirmation as well as aperture control.So, unless you buy an older AF-D Nikon lens you'll only be able to use the lens at it's widest aperture. Then if you bought AF-D lenses you'd need to buy a Nikon camera body with a built in focus motor to be able to use them, I believe the D7000 is the cheapest Nikon body still available that has a built in AF motor (correct me if I'm wrong, please).

Ask yourself, is it really worth it?