So every once in a while I keep wandering over to amazon.com and paw at the Canon t2i, wishing I had the 900 clams to drop on it and wiping the drool off my keyboard. Then I snap out of it, and realize that my XTI is a perfectly fine camera. Or is it? Before I got it as a gift, I spent a lot of time wandering around sites like DPreview, looking at the spec lists and comparing the differences between, say, a Canon XSI, or a t1i, or even a 50d or a 7d or whatever else Canon has on the high-end. The thing is, I don't understand what constitutes the differences in price. Sure, you get a higher megapixel count (which means nothing in the hands of a skilled pro), or maybe a fancier AF system (which, again, means nothing especially if you're manually focusing anyway). I suppose the better algorithms for noise reduction might come in handy, and the high-end cameras have (I'm assuming) sturdier parts on the body. Is it just a combination of those traits? A sturdier body and a bigger CMOS sensor? Fancier algorithms? Is it really worth the extra 1k, 2k, 3k, 10k for those features? I'm just wondering. I've barely had my SLR for a year, and I'd like to think it has plenty of life left in it (it's only taken 6k pics so far). Granted it's nearing 5 years old now as a model line, but it seems to do an okay job once I figure out what I'm doing. Is all the gear fappery just that, fappery?