Thanks for reminding me. Sign me up for a Haswell Mini. A quad-core Haswell with Iris graphics and a hybrid HDD would fit the bill real nicely.
I just bought the quad-core i7 Mac Mini and have been wondering if I purchased at the wrong time. Luckily, I have until January 7th to return it, since it falls within the holiday shopping time frame. The model you just described would be amazing.