I tried the HTC Vive as well as the Oculus consumer headsets at a number of London Meetups.  I got love for room scale…  so… blew up my bank account and have the HTC Vive on pre-order.  Should be receiving it next month (April 2016).  Valve have a test application that can provide you with an idea of how your hardware will cope with the next generation of consumer VR.  My PC’s test results suggest that I am going to need to update the old graphics card to do the experience some justice!  To be honest, I knew this was coming.  Seriously considering ebaying off my “old stuff”!