I will do this next time I get one in the office, but they have all been for customers.
I have dual RX480s on my testbench right now and a 1070 in my Mini.
I WILL say that my GPU of choice is the 1060 6GB (haven't figured out which one has the best cooler, price, build, and availability) and that is all the GPU power I need and then some and I LOVE the power draw.
The 1070 is an amazing card, but is super expensive, and is still too hot for my tastes (a huge improvement over the Asus 970 and a good pairing for power users with the HDPLEX, but I dont need that power to play Overwatch and Civ VI).
The 480s are brilliant and the Sapphire versions overclock well and even stock whoop on the 1080 in crossfire DX12. They are too expensive right now and suck too much power and ARE TOO LONG for the S4 Mini, so fail there.
The 1080 was awesome and I had fun with it and was SUPER impressed by its meager power draw and huge performance, but the price and length turn me off.
I haven't got a 1050 yet but I love the idea of it as I super loved my 750ti's cold operation. Keep in mind its hot where I live and I don't run the air conditioning unless I have too...so I don't like overpowered machines for my daily use.
/just josh thoughts on GPUs