I've had a Digital Rebel XT (film and now Digital) and am looking to take a step forward in lenses. I've been quite happy with the camera and its abilities, I thought about getting a 20 or 40D, but honestly the extra features aren't worth the cost at my level.
I have the "stock" lens that comes with it plus a good zoom lens and they work fine. The zoom is great, but the stock lenses are a little "sloppy" or loose, if you bump the barrel or lens it shifts and goes slightly out of focus. I had a friend visiting Boston (home) and he brought a nice camera to take some photos while doing the tourist thing about town and he explained the differences between some of the basic lenses and the lenses that are of a better quality, and it seems like a direction I'd like to explore. He mentioned it isn't necessarily the camera itself (though that is quite important) but the lens that can do the most to improve photo quality.
What lens(es) would folks here recommend for the mentioned camera and what are the benefits? I uploaded some photos in my gallery so folks could see what kind of shots I normally take. I also use it for photos of friends and family, but mostly for vacation and places.
Thanks for any suggestions.