I've not done any real dueling so my thoughts are probably not terribly useful but I'll throw it out there anyway.
For one-handed stuff, I like my Initiate v3 with a 32" mid grade. The balance is almost exactly at the edge of the hilt where it meets the blade, and with the Catalyst pommel it's just long enough that I can get 2 hands on it when I need to.
For 2-handed stuff, my Dominix v3 works better. It's long enough to get a solid grip with both hands and it balances out with the heavy blade about 2 inches up from the hilt. the mid-grade balances about half an inch down the hilt.
Very good taste, the Initiate V3 I used to have was a perfect one hander with a 32" blade. For those of us who like lighter, quicker weapons that can be used single handed (aka fencers) it's one of the best choices.