I'm looking at upgrading from a Canon T2i to a Canon 7D. It's available used for half-price from a friend of mine because he purchased a Canon 5D Mark III.
The T2i and 7D have the exact same sensor, so I'd expect the image size, video size, sensitivity to light, etc. to all be the same. However, the faster focus and more focus points, faster shutter, weather sealing, double the FPS when shooting in RAW, top-facing LCD and 100% viewfinder were impressive upgrades to me.
I've always heard that you should upgrade your glass before upgrading your body, and I am also considering getting a new, expensive lens. I have an inexpensive Canon 50mm f/1.8 and a Tamron 17-50mm f/2.8, but am considering getting a 70-200mm f/2.8.
In general - and in this specific case - what should I consider beyond cost and specifications in deciding whether it's worth it to upgrade?
EDIT: Sorry for such a vague question everyone, but I do appreciate everyone's responses. I will be using the camera for "burst rate and the ability to sustain it, better AF, and better high ISO response", "professional controls", and so on, so yes it will be "worth it".
This question would have been better suited for "chat", as I know the technical differences and why I'll be using the 7D, I just wanted to hear some opinions and this website isn't meant for opinions per se.
I just wasn't sure if there was any advice from experts that said "No, I should buy a 4-year old camera," "especially if the sensor is the same between the two cameras," and of the like.
The camera is $1799 CDN with a battery grip ($199 CDN) and will be purchasing it for $1000 CDN.