By Logan Mahan When we tested Dyson’s top-rated, high-priced Supersonic Hairdryer, we were left with near-perfect shiny blowouts and many words of praise for this high-tech blowdryer. Using Dyson’s famed technology, the sleek-looking Supersonic cuts drying time in half due to a super-precise, high-velocity jet of air, so you can style and quickly dry simultaneously. It also features intelligent heat technology that optimizes temperature and prevents extreme heat damage, leaving you with shiny, healthy-looking hair. Its only drawback is the $400 price tag. Though entirely warranted, it’s a lot …