Bulleit, easily. Nothing else at the price is nearly as smooth, IMO, though I could see how some might prefer a different flavor profile and pick something else.
Maybe it's just a distribution racket here in Chicago, but I don't know where you guys are finding Woodford Reserve at a decent price. It's a solid bottle, but always $5-$10 more than Bulleit, and no better IMO. I used to drink Maker's and still do in a pinch, but I find Bulleit is a lot better for only a little more. I'll buy a bottle of Knob Creek once in a while too - it's little rough for me, but I do like the flavor. Basil Hayden's and Bookers are excellent too, but too high end for a usual bottle in my house. Drinking a little less bourbon probably wouldn't hurt on that front...