Looking to build in a Lian Li sff case which require a standard size PSU ie. ATX (but not over size, only max 160mm depth and the smaller the better) As it is SFF modular would be best. I only need minimum 400W PSU. What would you recommend? I have looked around and modular PSUs are much more expensive and often higher watttage than I need. I'm looking to spend as little as possible but I want the PSU to last me a few years.