Brad said Skyraider so here goes my vote and the alternate. I always go for an original paint scheme (to the specific aircraft) if possible.
Few years back Brian had me do some research on his AD-5 and here's what i came up with.
AD-5W b/n 135188 ND-80 "Mama Bear" VAW-11 Air Group 15 USS Shangri-La 1958 pilot Ltjg Denver Johnstone.
AD-5W b/n 135188 GD-700 VAQ-33 1967
Two accurate/attractive choices of schemes the aircraft actually wore in service.
Link to photos is:
http://community.webshots.com/album/255549301CbDOLc
Now, since Brian's got her loaded down with bomb racks, he may want another scheme of a combat A-1E. My choice for that would be A-1E s/n 33889 1st Air Commando Group in Viet Nam flown by Capt Paul T. McClellan Jr. of Stayton, OR. Capt MCClellan was shot down and killed giving air support to the 7th Calvary at LZ X-Ray in the Battle of the Ia Drang Valley. If you saw the movie or read the book "We Were Soldiers" then you know the story.
Here's a link to the story of Capt McClelland
http://www.pownetwork.org/bios/m/m383.htm
And a link to some great photos
http://community.webshots.com/album/255560924eIYBeO
I think that this statement sums it up very well:
Paul McClellan died in defense of a little plot of ground known as LZ X-Ray, and to add his efforts to the recovery of a few men in Company C. If he were alive today, and knew that hundreds of his comrades are suspected to be alive in captivity today, one can imagine he would gladly fly one more mission for them.
Is the P-51 next????