Recently I ran into this support thread in which the OP insisted he needed an XPS 8700 to ship with the Intel Core i7-4770S as opposed to the i7-4770K due to its virtualization features. He even linked to this comparison table.
Except that’s not exactly true. The i7-4770 supports literally all of Core family’s virtualization features:
I strongly suspect Intel’s CPU nomenclature is the source of the confusion in this case. Most people are used to product name suffixes meaning upgrades or superior feature sets, e.g. iPhone 5S, Porsche 911 Turbo S, etc. In the Core i7’s case, however, suffixes mean the opposite. The best CPU in the lineup is the 4770. Period.
This means the Dell XPS 8700 – which the OP was asking about – should be able to manage all the virtualization tricks prosumers can throw at it.