Good plan, and the results will be interesting!
I'm a committed 12v person, whether alternator (late B31 and Oilfields converted using simple rectifier/regulator options and/or upgraded stators) or dynamo (AMC twins and A10). To begin with I retained my A at 6v, but gave in a while back and went 12v when she needed a battery.
All with DVR2s, courtesy of Manormike. No probs, but I live in the relative back of beyond and don't do traffic much, so higher cut-in speeds don't matter. Decent size batteries in all cases, wet ones for me, ranging from 8amp hours to about 12 depending on space.
One nice thing is the ability to use heated grips on a dynamo bike on the open road, if headlight kept down to 35W halogen and if original thick dynamo windings retained, when there are 80W available all the time at cruising speeds.
No way back for me, unless I lived in a town. Which will never happen unless/until senility steals the decision-making faculties.
Cheers, Bill