hi guys, i want to replace my bag (was an h&m one). its medium size - not a travel bag but also not too small. jumper, bottle of water, headphones, a book - i want to be able to be out for a whole day with that bag. brown would be my preferred colour. also i don't want to spend too much money - less then 30 pounds would be neat. different handy sections within the bag would be handy too. thanks!