IVoodoo units seem a little more pricey than CIOKS and the fact that anyone is charging >$100 for a 9-12V power supply seems ridiculous. These things are anywhere from $120 - $240!
When you buy a good unit, you're not buying ONE power supply. You’re buying a bunch of them, all isolated and regulated, with separate grounds. A one spot wall wart is a single supply (It’s much cheaper), the Voodoo Labs are all multiples. By the way, the Truetone multi supplies (big brother of the One Spot wall wart) are good, solid supplies worth consideration.