Number 2 is the most aesthetically pleasing in my opinion. Number 3 has too much going on and is hard to look at. Number 1 isn't bad but I think number 2 lets the 'G' stand out more than number 1. I could see using a plasma cutter or some such to cut the black portions of number 2 out of sheet metal and mounting them, slightly raised, on top of a junk motherboard, adding some ambient lighting underneath to light up the motherboard and having one awesome sign. :)
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