What's the backpack equivalent to a LT?

[samiam]

I use the LT as my everyday bag, and am wishing I had something a bit bigger. Since my son is mobile and we don't use the stroller much anymore, I'm thinking a backpack would better suit my needs. The LT seems pretty loved around here. I'm wondering if there's an equally well liked backpack for use with a toddler? I want something relatively small and lightweight. I have a One Step Ahead backpack that I use for travel but it's way too big and heavy for daily use.
Also, has anyone tried this new OSA bag:

http://www.onestepahead.com/jump.jsp?lGen=detail&itemID=260755&itemType=PRODUCT&iProductID=260755&change=117

[MommytoLayla]

What about a Chester backpack. Those are also loved by many. They feel small but can hold a lot and are comfortable to wear.
www.chesterhandbags.com


Shannon
http://lilypie.com/baby2/040421/3/0/1/-5/.png[/url]

[ckleist]

http://www.ebags.com/baggallini/urban_rip_stop_nylon_backpack/product_detail/index.cfm?modelid=47345

this is a nice little backpack that fits a lot for its size and cleans easily

[callalillyanne]

That's a cute little backpack! Might make a nice quick trip bag :)

Thanks for posting this!