I have used many products from XG, their Cases and Power Supplies, all of them are very very good products. The XG Vortec 600 Watt PSU for $100 (at Newegg.com) is just as good as the PC Power & Cooling 510 Watt (It maxes at 650 Watt) but is half the price. Their cases are well built and very cheap for their quality, they are worth it.
~~Mad Mod Mike, pimpin' the world 1 rig at a time