I'm sure this has been covered (and if there is a good thread already, feel free to link and tell me what a terrible search-er I am) but I'm looking for advice.
I've been shooting with my XTi for probably 5ish years now. It's got (I believe) about 12k shutter movements through it. I've been looking at upgrading, and am trying to decide between the T3 and T3i (leaning towards the latter). I've had this camera for years, and love it, but am wondering if I'm really missing something with a camera that's newer and "better". I like to think that my photography skills have really improved in the last few years, if for no reason other than learning my way around all of the settings... I've got a pretty good grasp on everything my camera has to offer, and haven't had my Rebel out of manual mode for years now.
One of the features I'd really like is a greater ISO range. I like the screen on the i, but it's not in and of itself worth the extra $$. Video capability isn't really important. I've heard that 18 megapixels vs 12.2 megapixels isn't necessarily a big deal, but I often give large(er) prints of photos I've taken as gifts for birthdays/holidays etc, and feel the higher mp rating would at least give me peace of mind knowing that if the photo DOES end up as a large print, it's not the camera's fault, it's mine (isn't it always?).
Now, my other option is of course, upgrading my lenses. While there *are* (always) more lenses I'd like to add to my stable, lately I've been reluctant to drop $ on a new lens, and put it on my old EOS... I think I'd be more inclined to keep upgrading lenses as I see fit with a newer, "fresher" body to mount them to.
So a few questions...
1. Does the extra 6 megapixels make a *real* difference to a hobby shooter?
2. I've heard 10k shutter movements on a camera is typically at "the high end", although I've not found a good source as to why. Is this true?
Long winded for a few simple questions I suppose, maybe I'm just trying to talk myself into/out of the purchase... either way, I'd love some help deciding.

