Well, I have recently ordered a ton of the Apprentice/Sentinel and the Initiate/Aeon/Dominix sabers of each v2/v3/v4 to have a nice variety for classes, so I'll be able to play around with which choke points and design I prefer.
I was more wondering about sabers that are based on movie/show models. Sabers like Electrum Wind, Fulcrum + Lost Gray, Emperor's Hand, Graflex, or Chosen One. Going into the cheaper price range, something like Bellicose, Prophecy, Liberator, Archon, Consular, Overlord, Arbiter, or Monarch.
With my Emperor's Hand, I use a two-handed grip, with one toward the bottom between the screws and the other just below where the emitter meets the body. Combined with a heavy blade, it's a hard-hitter for sure.
Of course I wouldn't be looking at things like the Scorpion, Raven, Reaper, etc. with all the claws on them for a duel, but something that looks like its grip was designed to be held onto while smacking sabers hard against each other.
While I ended up taking the claws off my Reaper, it still makes a great two-hander. It's not as heavy as the Emperor's Hand, which could take some power out of your strikes, it's large enough to allow plenty of torque on a swing, so you still will get some heavier strikes with it.
For one hand, I'd use either the EH (still possible if gripped in the correct location) or my Dark Sentinel v4. It's got a great choke point just below the emitter.