First problem is you have two CPU's, and two different GPU's. So as you can customise the PC which are you going for?
Chillblast Longbow. I actually prefer this one Chillblast Hurricane. Ivybridge is really not much of an improvement on Sandybridge and comes with a better,perhaps graphics card. Unfortunately it does not come with a monitor etc but as you have not specified a budget it is difficult to look at alternatives.
What sort of budget have you and what sort of games do you prefer?