I have successfully used medium from Expression Systems (http://www.expressionsystems.com/?mvcTask=productDetail&id=63). For the cells you don't have to buy adapted cells, you just shift your Hi5 cells to the new medium and culture them in it for about 1 week until they get used to it.
Then you have to do some optimization tests (i.e. when does your protein come up in this medium, how many doses of selenomethionine do you need in order to get good incorporation, and so on...).
I've achieved 80 % incorporation, which is quite good...