I was just offering alternatives to Zondas. There's no doubt Campagnolo make very good wheels. My point is, when considering how best to invest your money, you need to consider, what to do when the brake track of the Zondas is worn. If I'm not mistaken, Campagnolo don't offer replacement rims (correct me if I'm wrong). Which means you have perfectly good hubs and spokes, that'll be very difficult to reuse.
If you build custom wheels with e.g. Kinlin rims, you'll always be able to replace rims only, which is far less expensive than buying new Zondas. In other words, Zondas are probably best bang for buck if you only plan to ride that one wheelset for the rest of you cycling career. But if you plan to ride longer than your Zondas will last, then you need to plan further ahead than just the next pair of Zondas.
Besides that, as mentioned, the Zonda rim technology is getting a tad obsolete.
Campagnolo make good hubs. But so does Shimano, White Industries, Chris King, DT Swiss and a couple of others.
I get your point and it is perfectly valid.
I would also like to add that in the absence of a good wheelbuilder in ones locality and where the market of custom wheel is almost non-existant -- custom wheels doesnt look so attractive. Sure I'd like HED Belgium laced to WI but sourcing all these component will be a headache where I live and not to mention, very expensive. Kinlin laced to Bitex hubs looks like a logical idea in terms of functionality but the price itself is very close to a Zonda. Might as well take a Zonda.