Ask HN: Good way to display internal metrics?

HN, I'm looking to display our real-time metrics on the walls at my startup.

Any recommendations for TVs/wall mounts/monitors/projectors?

I'd rather trust a community rec than burn time comparison shopping.

The idea is inspired by the Square dashboards. http://jackdorsey.posterous.com/wow-square-has-already-processed-over-2000000

Thanks!