The above is a little Spartan with only dual channel (but 16 Gb of it) memory and a simple CPU cooler, the MB is good, though-I particularly like the PCI-E M2 slots-and it comes in almost £100 under budget.
Honestly, you're pairing a hot, power hungry CPU with one of the coolest, most efficient GPUs in scenario 1, and then flipping it to a cool, very efficient CPU and a hot, power hungry GPU in the second.
The above is a little Spartan with only dual channel (but 16 Gb of it) memory and a simple CPU cooler, the MB is good, though-I particularly like the PCI-E M2 slots-and it comes in almost £100 under budget.