IBuyPower just began offering up Dragon-based gaming machines earlier this month, but now it’s announcing three new machines for those with tighter budgets. The newest desktops in the Gamer series will all be made available exclusively through NewEgg.com, and none of them will break the $1000 barrier. Starting things off is the Gamer Power 505 ($519.99), which was built specifically for entry level gamers who will be perfectly content with the Athlon 5000+ platform and the Medusa Gaming Tower. Inside, users