That's a mighty fine PSU....it should last you a long time. Seasonic has a great reputation for quality.
My current case over the last three years is/has been and Antec LanBoy Air...don't believe they make them anymore.
It's essentially a mid tower case (non-pressurized) meaning it's pretty much all "screen" material and relies on direct fan placement. I currently have 7-120mm fans blowing on things along with 2-140mm fans for the Corsair H110 CLC and two 80mm fans on the VRM's and North bridge. A few months ago, when I got my GTX 770 and saw the size of it (btw, I named it "little pud"

)...I was worried it would fit in the case. The harddrive mounting in my case, allows the Hdd's to be mounted sideways so it was no problem.
Keep us posted on how well your new equipment/components are working....
Battle of Stalingrad is just around the corner?
I've been playing quite a bit of Insurgency and now have my own server...
Maybe see ya on one of these days...