okay I did an ATX Power Supply mount in the front. Here is what I have found.
ATX Front Mounted:
1. The Power Supply sits ever so slightly on the edge of the motherboard leaving a channel right beneath it to possibly mount a ssd or run wires through.
2. Getting the power supply to sit further up is a challenge to make sure you push the front IO cables to the top so they don't get crushed.The further you push them up or get thinner USB cables the clearance you have to push the power supply up higher.
3. I have a standard length GTX 1080 FTW 2 ICX card. Since I have the standard length the only clearance issue with modular PSU stuff is where the cables come out. If your big 24pin connector cable is closest to the GPU it is going to harder. I was able to get around it by spreading the cables out flatter from my PSU, which gave me the clearance I needed for the GPU.
4. There is a possibility of GPU Sag/pressure from the PSU cables. If you cable manage really well there won't be any sag. Little to no sag really.
5. Securing the Power supply was easy in my scenario. I have zip the grill of the PSU facing the front so it's pulling fresh air in. All I did is loop zip ties through to keep it in place. 4 Zip ties and it was fine.
6. Cable Management: I used the space beneath the GPU/PSU to put my 2.5 inch drives + the rest of my cables. bundled. I bet if you work hard enough you can easily have a 140mm or 120mm there if you don't bind your cables to the front mesh of the case.
7. This is a super tight fit, but it seriously allows you to put most of your standard ATX components. To be honest, I think this is the ideal setup since you can put hard drives in the area where the PSU is being cable managed and then have the entire bottom be fresh intake. Let the CPU cooler draw in fresh air from the back side. and natural exhaust to the top.
Overall after spending 2 hours cable managing that area I was actually able to do it. I have a noctua dh15 stuck in there since I don't have a compatible cooler at the moment.
Here are pictures, [USER=25]@KSliger[/USER], can we make a mounting bracket for this?
[MEDIA=imgur]a/eVZcNgj[/MEDIA]