Like anything, there is a certain level of diminishing returns.
If they are beater training wheels, just get DT swiss 340s/350s and don't worry about the rest.
A DT swiss star ratchet will last around 20,000-40,000km. They have been, and will still be a spare part at that stage. A set of pawls and springs from the others will likely not be available. I have seen, first hand, numerous Tune hubs with cracked flanges. They make very light stuff, but they just doesn't work as well as other products. They use a shitty proprietary bearing, their colours are inconsistent and their QRs don't work.
You will not get spares for BHS hubs in 3 years, let alone 10.
King hubs are excellent also. You'll need to fork out for a service tool after a little while, but they last soooo long and roll so nicely it is worth it. Lots of cool colours.
Have not played with a set of Alchemy hubs. They seem neat, although I've always had many, many happy miles out of Dura Ace and DT swiss hubs, and I don't think I would really go with anything else.