WTB: Overnight Pack/Winter Day Pack

I'm looking for a pack that I can use for winter day trips and general overnight trips - thinking around 30-40 L capacity.

Specifics:

- Ideally, something sub 1 lb
- Sternum strap
- Removeable or simple webbing waist strap
- Dyneema fabric (or something of comparable weight/strength)
- Simple design
- Cheap as possible

Models that I'm interested in:

Gossamer Gear Kumo - size Medium
Six Moon Designs Feather - size Medium
Golite Peak
Other?

Let me know what you have.

Thanks!