The Tenacious was my gateway Spydie too. Loved the PM2, but found it too expensive. After falling in love with the Tenacious, I sold all my Gerbers and Leathermans to get a Paramilitary 2 and a Dragonfly 2 ZDP.
I meant to sell the Tenacious away when the PM2 came and... I just couldn't. The knife is so robust and cool and fun to use. And amazingly in some ways I like it more than the PM2... more beefy, wider blade, nicer flicking action... steel takes an awesome edge too.
Well the PM2 is of course sleeker, has better F&F, far better materials and an awesome locking system, but the Tenacious still kept its place in my edc...