Looking for best HTPC for space and airflow

I keep my primary desktop computer in an audio video rack and would like to upgrade from my old silverstone HTPC case. It has done a great job but it is an earlier model with poor airflow. I had modded it to accommodate a liquid cooler but it was always a compromise.

Is there a recommendation for a HTPC case that has good space (has to accommodate ATX mobo and power supply) and good airflow? I'm not concerned about size.

Thanks!

This is what i used for my HTPC
LIAN LI Black Aluminum PC-C33B ATX Media Center / HTPC Case - Newegg.com

Now its just setting in a box.

I know you are coming from an old Siverstone case but I just bought the Grandia GD08B for a combo HTPC/mediaserver build. SILVERSTONE Black Aluminum / Steel Grandia Series SST-GD08B ATX Media Center / HTPC Case - Newegg.com
3 fan mounts on the bottom, one on the left, 2 on the right and mounts for dual 80mm fans in the back. Will accommodate an ATX mobo and full size power supply along with 8 HDDs.

I use the nMEDIAPC 1000B