Thin or thick radiator

[scotsdragon]

length doesn't matter I have my pump stashed in side the drive bays and go from my d5 to cpu upto rad and back top my tube res (I have the 900d also its looks tidy ) I just use 45 degree connectors to make sure I miss the ram

 

[delpy8]

My pump is is integrated into cpu block so I'm just running Hose from radiator to block/pump am I better with 45 degree or 90 degree fittings or will the straight out barbs do?