In addition to being quickly and easily accessible due to the pocket clip and one hand opening, most "tacticals" (and particularly the Buck Striders) are stronger, tougher, more heavy duty, and at the same time weigh less than traditional style knives.
From a purely practical standpoint, you should have at least one "tactical" and the Buck Strider would be a good choice. You are going to have situations where you know you are going to need one hand opening and closing, or where you might drop it from a high height and need something that won't break, or where strength/weight ratio is important (like hiking/camping).
There. I hope I've provided you with at least one justification that puts you over the "tipping point" and makes you buy the knife.
Incidentally, I have the 889 in my pocket right now, and my $150 Benchmades are in the drawer, getting jealous. That's how much I like the Buck Strider.