That would definitely be a more economical option. Downside is another intake and outflow port - EK's solution is supposed to have a single intake and outflow for the front and backside of the card. With my card vertically mounted I think this would be a nice thing, putting something like the DRAM plate and another in/out on the backside of the card might make it a bit tight up against the MB? I have more room to move the card "out" towards the side panel, but then this gets in the way of the I/O on the front side, too.
I'm still kicking things around. I'll do some more research on the effectiveness of that DRAM plate, though, thanks. Most I'd seen up to this point was people putting passive heatsinks with new thermal tape and mounting a fan or something to blow over it. I saw one guy 3D printed a custom bracket to hold like 5 or 6 little fans on it.
<edit> Of course, going back to a horizontal mount if I move to H2O isn't that big of a deal.