The guys (Colin & Wayne) over at Battle Systems are running a Kickstarter campaign to fund their SCI-FI Modular Terrian. They are a small company and the quality of the items shown so far are excellent.
There's one particular aspect of their Terrian that I like, and this is the flexibility of it. They have created a system that allows you to have a wall section but with this one wall section you can create multiple types of wall. For example you an slide a computer module onto the wall, or slide on a cryogenic chamber, how about a computer terminal, or a power conduit.......already with one wall section and a few addons you can create five different looks.
I've dedicated a page to the pledgers of the Kickstarter to give requests for additional terrain. The guys are taking this list seriously, and have already looked into creating some of the components suggested.
Take a look, and pledge if this is your cup of tea.