Considering WC two i7 setups

[xjmtx]

i have two i7 setups i use for my business both OCed with True Cogage heatsinks.

first setup is:
gigabyte ex-58-extreme
i7 920
12gb ram
4870x2
4650

second setup is:
Asus p6t6
i7 920
12gb ram
2x 4890
4650


the way this breaks down is simple. both machines have the True Cogage which does amazing for AC. i want to be able to take these machines to the next level. I'm a passionate DIY guy. i want my pumps, rad, res, etc to be in it's own housing that goes to both computers. from what i understand this isn't a big deal. just make sure you have a res before the pump so nothing gets burned out from being dry and make sure you have ample rad cooling to chill the water back down. would i need two pumps? to run lines from one large rad to two computers? i am considering cooling the ram as well as the vid cards (save for the 4650s because they're not OCed at all they're just used for the extra monitors). how strong do i need to have a pump to make flow to double the normal components as it would be two complete computers instead of one?

RAD>RES+RES>PUMP+PUMP>CPUs>NBs>GPUs>RAMs>RAD