Exploring the original knife designs, I came across this one...
12" blade is a little longer than I think I want, & the sheath gets aweful reviews, but the knife seems better than others costing much more ( according to the reviews ) this knife is supposed to be made in America...
http://www.amazon.com/Ontario-6420-K...=cm_cr_pr_pb_t
this one also gets good knife reviews, & poor sheath reviews... but knife is made in Taiwan
http://www.amazon.com/Ka-Bar-2-1249-...m_cr_pr_sims_t
I also looked at these... I like the saw on the back, but the blade is too long to strap on my belt & expect to hike, or work around the farm... getting into the truck, & or on the tractor would likely be impossible as long as it is...not sure how durable the handle would be long term... but if there was one with a 10" blade, with the saw on the back, I'd be all over that design...
http://www.amazon.com/United-Cutlery.../dp/B005FLMO9Y