Are you going to be recording and playing using eyefinity/across all 3 monitors? If so, you may want to look into a dual GPU setup as a single 780ti might not be able to push that many pixels.
Also, if you're not planning to add another card into your system, your power supply wattage could go down. A high quality 600w would power everything just fine.
full tower cases take up way to damn much room for no reason
you do not need 16gb of ram if you just gaming and recording gameplay
you can switch out the mouse and the keyboard for whatever you want
you don't need three monitor's because you said you were only using one for gaming you can use the 1tb ssd for storage and the hard drive as backup for said ssd
and last but not least i just saved you 100$ to spend on clothes food or activities
I concur, I owned a deathadder for 2 years (Naga 2013 now). The only thing wrong with it is the black finish is wearing down. for 50 - $60 it's a great little trooper.