I own a P180, but I have a couple things to say
First off, for your PSU, if that's smaller than an OCZ Powersteam you won't have too many problems installing it, but if it is, you might have to go ninja lol
The first time I set everything up, took me an hour or two, but I did it fast because I wanted to get my system up and running, did it again the next week, took 4 hours, and I build computers almost every day. So if you do get it, take your time installing everything and make sure all the cabling is perfect.
If you have a long graphics card (especially using PCIe power connector, might just be for Powerstream though) don't expect to use the top HD mounts (I prefer the bottom ones anyways).
The door WILL not be flush with the front power buttons (which can be fixed)
The case has decent area to work with, but plan accordingly
I replaced my front and rear exhaust fans and couldn't be happier, I am a heavy overclocker but wanted something I could bear in my room, got some 120x38 Panaflo Quiet Fans (the 31DBA ones)
Overall it is an amazing case and I don't think you will have many problems with that PSU, if it has one of those bottom intake fans (the one that would usually be directly above the CPU) then the PSU will have to be mounted so that the fan is facing upwards, no big deal