You know, this was my first instinct before I thought of anything else.

Then I realized that I would need to mount the radiators horizontally instead of vertically (which for some reason I was expecting to do)... So then I started thinking that the symmetry of things would be of... It's totally subjective I know, but I'm just not sure if all that tubing going across from one side would be attractive. On the motherboard tray (which is an EATX tray) I intend on making "drain holes" through where the tubing and connect and disconnect (but that's not why I'm doing it) .. I just think it will look very clean to route the tubing through the motherboard tray itself as apposed to curving it over the edges... Also, I think someone said that I wouldn't be able to fit the tubing and attachments in the space required with all three cards. I disagree with this and know exactly how I would do it.

Anyhow, thanks for bringing it up because lately I have kinda put that possibility out of my mind and I most certainly want to keep all my options open.
i think that the individual loop style may take a little bit of work to get really clean but i think that it can look really really really cool if done right i say go for it man

also with this grouped style i think the benefits of having such a large group of radiators is sort of diminished... with an individual style, i say that the performance will also be over the top. something to think about if you dont want both inlet and outlet tubes to be seen is to have an inlet from the back of the mother board above the pci slots and then have the outlet going across the mobo... if you need a better explanation please ask

anyways can't wait to see whats next and the fan grills look great