I'm looking for one thats going to provide the best all round image quality and versatility.
If your budget will cover it, I'd recommend one not on your short list - the EF-S 15-85mm f/3.5-5.6 IS USM (along with a body-only camera). Optical quality is substantially better than the other lenses, and the focal range is excellent for general-purpose use. It's only 'handicap' is one shared by all the other lenses on your list - a variable/narrow aperture, meaning fine outdoors but not as good indoors. The EF-S 17-55mm f/2.8 IS USM is another excellent lens that is faster (wider aperture), but substantially more expensive. Instead, you might consider supplementing the 15-85mm (or 17-85mm/18-135mm) with the EF 50mm f/1.8 II (aka nifty-fifty, a fast prime that's decently sharp although not well built, and is the cheapest lens in the Canon lineup). Also, consider an external flash (light from the pop-up is harsh, and IMO pictures taken with that look like they could have been taken with a point-and-shoot) - get one that allows you to bounce the flash off a ceiling (e.g. 270EX II, although I recommend the 430EX II if possible). Finally, consider a decent tripod - IMO, Manfrotto is the optimal compromise between value and quality (getting a cheap tripod just isn't worth it); although they are commonly used with ballheads, a fluid head will be better for video.
If you haven't run across The Digital Picture yet, there are great, informative reviews of Canon products there. Here's the link to the EF-S Lens Review page, which has lots of details about the lenses you're considering.
Good luck with your decisions!
I second (third) the 15-85. It's a superb lens and I've gone back to it as my go-to lens.
If you're stretched for cash but want something now, get a 50mm and a body; avoid the kit lenses.
If you have to choose between the t2i and 60D and you're on a budget, get a nicer lens and the T2i.