Anybody know if it's possible to buy display cases for your house?

Some of the houses (like the one in Skingrad) you can. There isn't a way that I know of to do it for any of the others though.

There is a mod that adds underground display rooms for all purchasable houses except the one by the waterfront.

Lots of display cases along the walls, and on the floor there are pedestals where you also can put loot, although they're meant for another mod that lets you dress mannequins up in clothes, armor and weapons. The mannequins are easy to place, orientate and dress up. Quite cool to have mannequins with all the diffferent armors in the game...

Links:

Display Rooms

Mannequins


(This pic is from the site above.)

Too bad I'm on the 360 then, mannequins would be awesome!!!

I have 360; you get 6-7 display cases you can buy for the Skingrad house at Colovian Traders.
Enjoy!

Sweet, done deal...