I am an avid photographer and love doing easy day hikes (<5 mi round trip). I've never considered speciality hiking gear and so far the blue Jeans with sneakers have served reasonably well. However, I am soon embarking on a NW trip with several day hikes in mind and realized that my luck with being unprepared might just run out anytime. Hence the following question.

Please recommend a backpack suitable for day hikes. It'd be nice, but not necessary, if the pack could also suffice for a weekend overnight trip, which is the longest trip I might indulge in foreseeable future. Upon some research, I found the following few packs seemingly suitable to my need.

GoLite Jam 35L
Gossamer Gear Murmur Hyperlight Backpack 2012
Osprey Talon 22
Osprey Hornet 24
Black Diamond Magnum Pack
Black Diamond Blaze Pack

Thanks in advance.