The Media Servers from Arkaos ranked up, with their Input cards:
Stage Server: 1 x Full HD DVI
Studio Server: 1x HD-SDI
Stadium Server: 2x HD-SDI
Studio Server 4K: 1 x HD-SDI
Are you in need of more input cards? There's a couple of empty slots in each Media Server to fill with input cards.
Possible upgrades:
Stage Server: up to 2x HD-SDI or 2x Full HD DVI Inputs
Studio Server: up to 4x HD-SDI & 2x Full HD DVI Inputs
Stadium Server: up to 4x HD-SDI & 2x Full HD DVI Inputs
Studio Server 4K: up to 4 x HD-SDI or 2 x Full HD DVI Inputs