KitGuru tried the OcUK Ultima Finesse Blackhole Gaming PC
A quote from the article:
Nvidia's GTX 970 sits in that graphics card sweet-spot where it's about 10-20% slower than its GTX 980 brother, but retails for only 60% of the price. It's that alluring balance between performance and value that makes the GTX 970 a smart candidate for constructing a strong SLI configuration.OcUK Ultima Finesse Blackhole Gaming PC Review @ KitGuru
OcUK realises that multi-GPU potential by offering up to a pair of KFA2 GTX 970 Infinity Black Edition graphics cards in its Ultima Finesse Blackhole system. Forging the path for the GTX 970s are Intel's competitive Core i7 5820K CPU and an MSI X99S SLI Plus motherboard.