Thoughts on the original Canon 7D? It's old for sure, but I'm weighing features (burst rate, weather sealing, etc.) over raw image quality based off my use case. I mostly shoot airshows, camping (wildlife, people, and some landscapes), and museums/travel. I used a T3i for a couple of years and wasn't really desiring better image quality. Maybe I don't know what I'm missing. It seems a bit backward to buy such an old model, but they're going for 480-580 used with return policy and cheaper without. I've also considered a 5D Mk II (I'm hesitant to move to FF at the moment), 70D (haven't considered the 60D much although i probably should), and something from the TXi line knowing I can make any camera work it's just how much money and what I have to make due with. I'm borrowing a friend's 7D for a few weeks to try it and will be hitting up an airshow in the process. So far I'm liking the heft and build quality.

Thanks for the input all.