ZT 0350... I bought my older son (now 48) one about six yrs ago. He still carries it and loves it. I just sharpened it for him, but it is a great knife that can be used for heavy duty or casual use.
You can NOT hurt this knife. It is NOT fragile, and the lock-up is bank-door solid...
I've had quite a few BenchMades and carried one for office use for several yrs...The CPM-20CV steel in that BM 1501 is excellent and will hold an edge for a long time,...but it costs sixty bucks more than the ZT 0350. AND...you will likely have to send in your knife periodically to Benchmade for sharpening...(which never impressed me).
For that sixty bucks differencd, you can get the ZT ...AND... a Spyderco Triangle SharpMaker which will let you sharpen knives until the cows come home. I've had multiple BM's, Emersons and ZT's. ...ZT all the way.
Many of us here own or have owned the Sharpmaker, and it's an excellent piece of equipment...It will last you forever.