I would go with the three gallons of Belgian pale or maybe a blonde.
I brewed up a Belgian blonde last weekend as the starter for my quad. Turning 40 this year, so I need to get that beer brewed, kegged and aging so it's ready for the party.
On another note, I prefer Ardennes in lighter beers but it may work well with a dark strong. I used it in a dubble and, while it certainly wasn't bad, I much preferred the batch I fermented with the Chimay strain.