I came across this while looking for a deal on the Blackwidow Elite (Yellow Switches).
A note on the Tiamat 7.1 V2: It's an analog headset, so you'll need to make sure your motherboard has all the required 3.5mm connectors.
(Green - Front L/R, Pink - Mic, Orange - Centre/Sub, Black - Rear and Grey/Blue - Side) - Colour may vary by motherboard, consult the manual to be sure.
I've been a fan of the Tiamat for years, with my V1 lasting well over five years. I recently made the jump to the V2 and it hasn't missed a beat.
At time of writing, the cheapest deals on StaticICE for the individual items are:
Blackwidow Elite - $215 @ MSY and CPL
Tiamat 7.1 V2 - $179 @ MSY
DeathAdder Elite - $75 @ PLE (Overwatch Edition) and $79 @ mWave, UMart, Austin Computers and CPL (Regular)
If you're interested in the deal but lack the ports required by the headset, I had some success helping a friend get it working using an external sound card. (We used this one from Jaycar)