Nimo....I'd give some thought to the 17-55 IS 2.8. I had no issues w/this lens(combined w/my 40D at the time) inthe lowlight in the chapels of Santa Fe, NM last year, e.g. http://www.flickr.com/photos/29409592@N03/4792626239/


IMHO it will give you sufficient wide angle andmore versatility than the 10-22 and 24, as well as match up well w/your 70-200.


When I travel the 2 lenses I take are the 17-55 and 100-400 and use my feet to make up for the 45mm difference. []


Good luck and enjoy your trip...


Bill