Hello all, I usually hang out in the multitool forum, but thought I should make my first post in the spyderco forums today...and ask a question. Here's the problem, I have a delica 3 FRN comboedge that sits in a curio cabinet with the rest of my humble collection. Basically, it is new/unused. I just started an internship in an auto repair shop and need a good knife to cut some tough stuff like thick cardboard boxes and thick rubber hose. I wanted to get a new D4 comboedge, but my funds are limited as of now. I thought about taking the D3 out of my collection to use, and replace it someday with a D4 when I can afford to buy one. The only problem is, I can't decide whether to use the D3 as it is discontinued, and in my mind, somewhat more valuable. So, what do the spyderfans have to say? Should I just leave the D3 in my collection and wait to buy a D4 to use, or just take out the D3 and put it to good use? I also should mention that I want a good locking knife to carry when I go for walks around home here, as some of the backroads I walk are fairly desolate, and having a good lockblade on me provides piece of mind. I eagerly await your responses..