Choice 1 for your parameters - A model 55, from the jigged Buffalo horn series. A picture is available on the Buck Website specials page. Perfect high class, just big enough to do anything, small enough to carry everyday knife. That looks high class.
Choice 2 for most of your parameters - Its not a tactical, but has a pocket clip. Small Vantage Pro, fancy steel, fits the pocket well, can open one handed if holding something to cut with the other hand. Not real fancy looking but built of great materials. Sets in the pocket great.
If both of those are too big, then a 309 with stag scales, also visible on web specials page. Smaller two bladed, classic looking slipjoint with high class scales.
300Bucks