The D5 bay Res kit should fit good. If you plan on running only a single rad, get the AX240 kit since the AX is somewhat in the same performance level as the RX minus a few degrees. The RX rad won't fit at the top of the stryker, but it will fit at the bottom. If I had the option, I would run the AX240 at the top and RX at the bottom, but you lose the tool box feature and bottom hard drive cage, or run a AX at the top and bottom and this will give you room for a GPU later down the line in the loop.
if you want a Tube Res, in the Stryker its going to be a tight fit. Trust me. I tried when I had the stryker.