I personally think you'll be better off with wire strippers. Unless you truly want melted/burnt/sticky plastic on your 'special/intricate/delicate' projects..
Just saying. The insulation is just going to melt at any power that wouldn't cost more than you apparently want to spend. It's not going to vaporize and magically vanish. Heat up the end of a cat5 cable and your just going to get the outer jacket melted with all the wire insulation.. Not to mention fumes that you probably don't want to be breathing.
The whole thing just sounds extraordinarily messy to me, not to mention dangerous in an environment with lots of people. I know most of the cabling jobs *I* end up having to do always ends up being at schools or offices with lots of people wandering around. No way would I bring a high power laser to such places to do something as mundane as stripping wires. It's the whole 'right tool for the job' thing, and a high power laser isn't the right tool.
Anyway. Just my two cents.