I am using a
Bally Jump-MD.J (pic in the link) from their menswear ss2011 collection for school... it's huge and basically I can dump everything inside (e.g. on my gym days, I fill the bag with my running shoes, gym clothes/towels, a macbook pro 15" and lots of other stuff)... surprisingly it's holding pretty well and the bag sags like a Celine phantom... most importantly is the handles are long enough for me to carry it by the shoulder
if you are intending on spending a lil' more... I would recommend...
Balenciaga weekender/part-time (if you need a sling)
Chloe Marcie large
Celine luggage tote (a mini would be good)
Mulberry Alexa or PS1 (but most likely they are also on the arms of another 100 girls in school)
Anyway what's ur laptop...? If you are using a macbook air or something around that dimension, maybe you can consider getting Celine tartan cabas... I saw it at the boutique the other day and it's one of the better built cabas as it is internally lined with lambskin and the strap seems to be thicker than usual. It's retailing at SGD$1500 if I didn't remember wrongly. I am really tempted to get one for myself when I saw it...
And please please please, don't get LV neverfull, it's a waste of money and I have heard horror stories from my friends about the strap breaking... invest in something better, like speedy 40, artsy or delightful (that is if you really want an LV)... Prada nylon bags are not bad too... and YSL fabric bags...
I think that Longchamp Pilage are over-rated... there was once I nearly blurt out in laughter when a girl sitting behind me was showing off her pilage (which was a gift from her boyfriend) to her friends...
I have a friend who is using a Jimmy Choo Riki tote, interesting...