I wondered the same thing Nathan and decided to go ahead and purchase the entire set (including the hatchet). Here are my top ten reasons:
10 - due to the cost, they would make great users if you can force yourself to use them (heck, keep one in the car, boat, etc)
9 - might be thinner blades, however, that makes them faster
8 - still the best steel on the market (INFI)
7 - the Zero Tolerance edition is even better looking than the regular versions
6 - limited edition - so if you tire of them you can sell them a year from now for more than you paid
5 - you got to love the name!

4 - you can always try throwing the hatchet
3 - they will outperform anything else at three or four times the price
2 - you'll only wind up spending the money on things that you don't enjoy half as much and which probably won't appreciate any more (like stocks)
and the number 1 reason:
1 - You know you are going to buy them sooner or later so you might as well just get it over with now !
