Single 760 actually.
The ASUS looks really good - interestingly, there is also this model of Dell UltraSharp I'm looking at: http://www.amazon.com/Dell-UltraSharp-U2312HM-IPS-Monitor/dp/B005LN1JEC/
That's rated at 8ms, however take a look at this review:
http://www.tftcentral.co.uk/reviews/dell_u2312hm.htm