I have an XSi. I just saw the new T2i. I am in a bit of delema. Do I sell my XSi and upgrade to the T2i for about $400 or do I see if I can pick up an HD video camera for about the same $? I can't see there being much of an improvement in photo quality in the T2. Especially with more MP's on the same size sensor. And I am not a megapixelphile either. Any word on how much better the Digic 4 is than the 3? How is the noise reduction improvement?