renners :
rest of my build is amd athlon x4 760k 100w
4gb ram
asus a55bm-a mobo
2 hdds
one optical drive
msi r7 240 graphics card
any advice would be awesome and my old case is a cooler mster praetorian 730
You're fine with the PSU you have at the moment.
For the case, just get something that has the features you are looking for, like fan slots, looks, etc