A Windows PC is by definition unreliable. Why the Core i7 when you've read the following?
"Our tests demonstrate fairly little difference between a $225 LGA 1155 Core i5-2500K and a $1000 LGA 2011 Core i7-3960X, even when three-way graphics card configurations are involved. It turns out that memory bandwidth and PCIe throughput don't hold back the performance of existing Sandy Bridge-based machines. "
The primary reason I encounter for dedicated graphics memory is gaming. And yes there are a few gaming 14 inch models but I'd still get the XPS or Alienware with my money.
Does anyone know of one made by one of the more reliable brands (not Dell or HP)?