After a brief search, I found two versions of the MSI Vortex. One with 960 SLI (2000€), one with 980 SLI (3600€). For what they offer, they both seem very overpriced...?
As for the Asus ROG G20 serie, those range from 850€ to 1800€, with varying specs, but topping at one GTX 980, apparently (which should be fairly comparable with 960 SLI). They are a little more reasonably priced, but wouldn't call them cheap, either.
But, if you're willing to splurge some money, then I could recommend taking a look at Zotac ZBOX Magnus EN980 SE, starting from 1700€, after which you'll have to purchase memory, HDD and operating system of your choice. They usually provide a "PLUS" version as well, which have the extras pre-selected. Couldn't find one for the EN980 SE, though.
Specs for the EN980 SE:
- Intel Core i7-6700
- nVidia GeForce GTX 980
- very small custom form factor
Not to be confused with the regular EN980, which is equipped with i5-6400. Should be a fairly nice and slightly cheaper alternative, though.
Keep in mind that with this serie, you're paying extra for cramming relatively much horsepower into a very small space.
