well this is an open invitation for flames from all sides I know it..
Anyways, I know where you stand on the whole OS side of things but XP is not a bad OS. Sure it is pricy but you get what you pay for. And XP will continued to be supported for a while to come. And by the time it isnt supported, Vista's rancid odour will have faded a bit. Glory of microsoft (and linux but not mac) is that there is legacy support. So even when XP dies in 4 or 5 years, SD will work perfectly fine on Microsoft Zlorch or whatever it is by that time.
And i dont use SD because RR is free and just as good