With the 2.120mm rad at the bottom, if you switch the orientation so that the inlet/exhaust is nearer the PSU, you can hide the length that goes to the pump behind the rad/fans, and the feed that goes to the bottom GPU is straighter, which would look a bit neater.
EDIT
Actually, it may not go that way round - what do you think?
EDIT
Actually, it may not go that way round - what do you think?