A lot of the choice depends on your personal preference. The point is that there is no correct answer, and a lot of the choice is dependent on how the mask feels on your face. If you like how a single-lens feels, then go for that. If you like the feel of a dual-lens, then go for that. Dual-lens masks are usually lower volume than single-lens masks. Single-lens masks are easier to find with prescription lenses.
If you feel claustrophobic with a small field of vision, then you should choose a dual-lens. A large lens can have seems in it which can be distracting, but they will allow you to feel more free.