Thanks for the reply and the recommendation.
Yes, it is for mining primarily for now, if that doesn't work out it will be for gaming and whatever. Again, I am just getting started here.
I do not think I can run 6 GPUs (with heat, and power supply requirements), or invest that much money into this. Was just thinking of 2 GPUs. By the way, if you can use GPUs even on slower PCI-E slots, does that mean that PCI-E speed does not play a significant factor in mining? How is the mining performance between 16x, 8x, 4x and 1x PCI-E slots?