seriously. Weight isn't really an issue for most wrenches.

Personally, I use a cool little lo-profile ratchet from gear wrench: http://www.gearwrench.com/catalog/xl...m/gearratchet/

The sockets have a pass-thru design that allows for access to long bolts without a deep socket. Pretty lightweight, and a ratchet is more convenient vs wrench imo.