Well it's a hundred dollars cheaper than I thought it would be but I'm going to stick with the Oculus Rift for several reasons:
1) I have set myself a £500 limit to spend on an HMD, getting a Rift and then the Touch controllers separately will allow me to spread the cost. We'll probably have to spend £699 plus shipping for the Vive, too rich for my blood.
2) I prefer the design and functionality of the Touch controllers to the Vive controllers.
3) The Oculus Rift will be easier to set up, I'd have to start messing around with drilling holes and mounting the Lighthouses with the Vive.
4) I don't have enough room for Room Scale VR.
5) I prefer having Lucky's Tale bundled compared to Job Simulator and Fantastic Contraption.
6) The Rift is going to have more developer support due to developers having Rift devkits for 3 years, HTC haven't made enough of an effort to get Vive devkits to developers.
Am happy that HTC haven't priced themselves out of the market though, they certainly have a competitive price. All 3 VR solutions should do well I think, with PSVR being the best selling mainstream choice...and that should mean that we'll see plenty of multiplatform games with developers having the PS4 as the lead platform and porting their games to the PC.