I have used a couple of the Corona 7" saws hard for a few years. The blade stays very sharp for a long time and is overall quite durable. Replacement blades are inexpensive. Not sure on the weight, heavier than the Opinel for sure but still very lite. I like the price as well, around $23 on Amazon. Corona also makes a wood handled similar version.
http://coronatoolsusa.com/rs-7245-razor-tooth-folding-saw-7-in.html 
