May need extra tubing depending on the disances between componants.
Angled Fittings if you plan to go from your GPU straight to your CPU without kinks.
Do the GPU blocks come with fittings?
Aqua Link fittings for between the 2 gpus.
Prolly would have gone with the X360 if you plan on running all this on 1 loop. The res included is not very big, and the X360 comes with a better pump. The smaller Res is going to need topped off more often, so may look in to getting another res.
Hope this helps, goodluck!