I recently bought a Lowepro Rezo 190AW @ S$50 (its Nikon version. Nikon logo on shoulder pad and front cover). i got it from simlim square brand new sealed. I use Canon so i remove nikon logo on front with pen knife then put iron on black sticker on shoulder pad) Voilà !!!
It can fit > 7D with battery grip + 10-22 hood attached or 24-105 + 1 more lens + 580 exII
What more ?? 1 Side and front pocket + rain cover + LCD protector or Lens cleaning cloth + card holder + small removable accessory pouch with ez link card store place (* dont know how to call it LOL)
the bag size does not look big but u can put hell lot of things.