I like to overhang on the top also. It's not uncommon to find tables with tops that overhang like Dave's. If I were going to do anything, I think I might rip down an apron to 3" instead of 4" and see how it looked. The only reason I'm thinking a 3" apron may look better is, it looks like Dave is working with multiples of 3/4 (3/4" top, 1 1/2" legs), so a 3" apron may look a little more proportional since it's divisible by 3/4 evenly.
MTCW
Thanks