incrediBILL - 10:38 pm on Mar 15, 2012 (gmt 0)

Yup, I'd stick with the quad core all the way with those specs. I'm running a dual quad core machine myself and it's very nice :)

If there's a big price difference and you're just cutting costs the spec on the dual core isn't bad, but 40K visitors/day should have dual quads IMO just to remain snappy.