I've decided to take the plunge this weekend. Been on XP Pro since it's inception but know I'll have to switch sooner or later and XP has been acting quirky lately so I'm pulling the trigger. The details of my current setup below: Hardware * Intel Q6600 with 4 gig ram * Two Nvidia Quadro NVS video cards * Asus Rampage MotherBoard * 6 monitors Software * Multicharts * NinjaTrader * TWS * Custom TWS API Has anyone had any trouble making the switch with any of the above hardware/software? Also I am assuming that the 32 bit version would be preferable. I have heard that the 64 bit may cause some compatibility issues with some software. I'm not really worried about security.