One more comment, if you get a dynohub wheel, if your front wheel rims have brake wear, it would be better to go with new rim, meaning a whole new wheel with dynohub. But if old wheel is a disc brake wheel, then the rim should not have any wear, then using the old rim in a new wheel might make financial sense.

Even if you are using a rim brake bike, buying the disc brake version hub could make sense. A friend of mine bought a new dynohub complete wheel three years ago with a rim brake hub, then last year bought a new disk brake bike. Suddenly his dynohub wheel is not getting much use any more.