NX200M by Antec is best balanced case available both in terms of price and features. Though the build materials are not if the highest quality but for the price it is very decent.
Didn't know it was smaller than Asus AP201 but Kudos to john1911 for showing us the comparison using 3D view.
The case even has a PSU cage which prevents components like GPU from receiving heat from the PSU.
One thing I'd like someone to clarify is that, is it possible to mount the 2nd front intake fan a bit lower to allow the air flow in PSU cage?