The T2i is a lot of camera for the money. It offers a 18 mp and the same sensor used in the T3i/60D/7D, and takes HD video—pretty darn good for a consumer-grade camera. Hold them both and lay with them a little bit to get a general feel for what it would be like to operate them.
I love my 60D but if I would probably also be happy with the T2i. Some say it is too small, some say it is just right, but few dispute the quality of images and video it is capable of shooting. Getting a T2i for around $500 is a steal, but so is getting a 60D for $650ish via the Canon Loyalty Program.
As for lenses, check out the forum here for lenses at a discount from buying new.
This^ I have both, the T2i|60D and love them both. I only bought the 60D for the flip screen (for video) and the wireless flash capabilites. When I don't plan to shoot wireless ttl or video I take my handy T2i (which is probably my favorite between the two). How is that possible, well I like how lightweight the T2i is and I can easily throw it in a small bag with the canon 50mm 1.4 attached to it. I can take it everywhere without the weight.
Either camera is a good purchase and if you're a hobbyist like me that doesn't shoot in the rain or underwater either camera will serve you for years to come. Stick with what you're looking at and don't get pulled into the 7D/5D hype. As you've seen already people here will look over what you asked about and suggest that you buy something that you didn't even mention or that's not in your budget. Stick to your guns.
And to answer your other question always invest in good glass over camera bodies. To find some good people portraits taken with both cameras check out flickr. Good luck.