That's a good call because applying to all 10 would be a ton of work!!
I would take Haas off your list. It's the biggest reach you've got, and with a small class size, it's very competitive.
I know from the beginning you said you liked Tuck and UCLA and Duke, so you could keep those, Tuck is a reach but might be worth a shot, especially if you can demonstrate strong cultural fit.
As for your other two, I think you could really pick any of them...UNC Kenan-Flagler would be a good one to keep (I think) because they are quite good in Marketing and they have the highest acceptance rate of those you list. Think about some other factors too...for example do you like the case method? If not, then take Darden off your list. Do you like the small town / campus feel of Tuck? If so, then you might not like Texas which is in a pretty big city (Austin). Is it important that there be a strong alumni network in a certain region? Or, take a quick scan of the application questions for each school and see which ones you are most excited to write about!
Good luck!