Sorry, when you said walk around lense I assumed you meant something basic. Frankly, for the $ the kit lense is pretty good. Your best bet is to visit the forums on dpreview, and specifically the one for the rebel. do a search and you will get a ton of advice.
WRT the other lenses, don't you think the 70 200 is pretty tight at the low end? approx 112 mm does not give you much of a wide angle. I find even the 50mm (~80mm) is pretty tight a lot of the time.