I dithered for ages about this, feels like they should be cheaper.

In the end I went for a Tempa Pano EKO, which enabled me to have a glass front. From memory, the non-glass version, 800x600x300 was about £115, with glass circa £130.

http://www.tempapano.com/en/eko/

Is it overkill? Yeah. Is it nice? Uh-huh.

Space wise, I think its about right... theres plenty of room left in mine, and allowed lots of space for airflow and future expansion. But, honestly, I'm not using most of the depth and its all about how you want to package it. I could probably have fitted the same components in 500x500 or less. Have a look on my log for a reminder of how full up my cabinet is, page 9 post #87 has a photo.

Alternatively, I also looked at used server racks, which seemed like a viable option.