Basically balanced 1v1s boil down to Angoville, Langres, and Semois. They each offer their own taste but they are THE most balanced 1v1 maps.
I like all three. Each has it's own advantages and disadvantages. Langres is quite small and offers lots of flanking play, cutoffs, and plenty of resources, but combat is fairly dominat on the east side not the west. I feel the map is a bit crowded too which makes it deathtrap for mines.
Angoville is the average I feel. It's got 2 sides to it, a more urban enviorment which is fueled further by the hedges which block some flanking and leaves mining operations easy to do on the main road. The field on the left also offers better flanking advantages for the allied factions, and allow more maneuverability. The only problem I feel I have with this map is that basically it's low points and high points, and if you hold one side of the map you can win.
Semois is also a more urban enviorment. Mines make huge nasty traps on this map and I feel it's fairly balanced. Cutoffs will hurt you in the longrun if you don't watch your flanks.
My chart goes Semois=Langres>Angoville
"Balancers are 10 a penny"