High Sierra Tangent 45 Backpack
We just picked one at Costco NW for only $55. You can buy it in three different colors: black, grey (with bright green straps) and red. Obviously 45 litres is too large for a short day trip, but should be all right for long 20+ kilometres hikes such as Mist Ridge. The only potential problem is it has no pockets. Otherwise, it appears to be a pretty decent ventilated backpack for a good price.