i ws thinkn a remington vt taper barrel fluted and cut to 20".
the sendero weighs 8.5 knock 6"s of barrel off it and i bet loses a lb or so.
look into the ltr ill get you a link. its a 20" heavy barreld rig remington builds for the police force. i dont think its that heavy and it doesnt cost an arm and a leg either. a
heres the link.
i think youl like it.
http://www.remingtonmilitary.com/700ltr.htm