Traveling backpack for europe.?

I am going to a couple different places in Europe for two weeks. Sometimes I will be staying in hotels or other places. But will be moving around a bit. Not going crazy. Still I would like to get a good light weight backpack to use instead of carrying around silly luggage. Also, hoping for something not to expensive. Any brands or suggestions?

I've used a pack like this 3 times when travelling to Europe. You won't climb mountains with it, but for travel it's very good. Nice to have wheels yet have the backpack capability.

http://www.mec.ca/Products/product_detail.jsp?PRODUCT%3C%3Eprd_id=84552444250 6335&FOLDER%3C%3Efolder_id=2534374302883030&bmUID= 1181576525086

hello
had to comment as i am also in a similar situation...I can't give you much advice on backpacks but am hoping to find the same sort of advice myself! :)