Woah, haven't been back to the forums here in some time... nice remodel I see so far!
I discovered this cocktail recently that involves bourbon and cognac together, it's called Brighton Punch and it's real easy to make too.
Great thing also is you can really experiment with this one trying different bourbon and cognacs also. I've done this using Basil Hayden's below matchin my 80 proof VS grade cognac, and also tried a WL Weller too which worked nicely too.
Check out the video below I made for it.