You'll probably get 20 different answers.
However, I've had good luck with Antec 300. It has a side area where you can route the cables to. Air flow is very good when paired with good fans. The internal HD drive bays are mounted parallel with the air flow, so no air is being hindered to the GPU and CPU. Front fans has dust filters, easily cleaned with just side panels removed then front bezel removed.
Folks might recommend CM 590, 690 and NXZT Beta. The 590 looks similar to the 300. I dislike the 690 and Beta because the drive bays are mounted perpendicular to the front air flow. But this is just me, I'm more of performance air cooling and less on looks and design.
Not sure what HSF you have, but folks can fit a T.R.U.E. in a 300. I've also used a Xigmatek S2183 in my 300.