the design look fine, in an M$ paint kindof way
If you aren't after the highest oc speed and lowest temp, you should be fine with this.
But you WILL raise your cpu temp. In order not to, you would need a sepparate system sharing only the water reservoir with the rest. so the gpu has it´s own radiator and all. in any other way your cpu temps will go a bit higher. but if you have descent temps, you should be fine.
Any other comments?