Be careful of your matter/antimatter intermix in the dilithium chamber or you could cause a wormhole that takes you back in time to when dinosaurs roamed the earth and @Rolex was a young man....
Go with the nVidia GTX970. It has lower power consumption and has better specs than the AMD cards. I have the 256GB 850 Evo and got it for about $100 which was the same price as the 840 Evo.
I remember the days of punch cards, but I actually used marked cards. I also remember tape drives (remember the TRS-DOS "CLOAD" command?)as well as 5 MB hard drives. Yeah, I've been messing with computers since before the days of the Internet....
The 750 GTX Ti that I'm running in my new workhorse isn't exactly tiny. I do like the lighting under the dust shield. I'm getting a second Samsung EVO 850 250 GB to run a RAID 0 in it as well.