I should probably tell you the parts to help you think through:
Swiftech MCW6000
Undecided chipset block (probably will be old and cheap) which will change to a GPU block when I can afford a GPU

DDC
BIP II
Danger Den Fillport
lots of tight turns...hopefully no elbows
It;s all going to be 3/8ths although I may go to 1/2 by the fillport to slow things down a tiny bit, but it depends on how hard that ends up being.
it doesnt sound like it's going to be too much of a problem as long as I get the system well bled. Am I right?
Any other thoughts?
thanks
Twill