There is no reason to do water if you're going to Half ass it.
I didn't say that was half-assing anything. Like I said, given the right fans on the correctly-matched radiator, you don't always need a push/pull.
And Conumdrum is right, that DD rad is a little outdated. I have 2 of the Swiftech MCR320's and they work well for me. They aren't the absolute best, but cost/performance-wise, they are great for the money.
You have to realize what is the best for your individual budget and plan accordingly. If you can only afford certain components, it will do you well to research what is good for the setup that fits your price range. Having $150 in awesome fans with a push/pull doesn't make much sense if you can use the right CFM fans for the fins on the rad you choose...and only use either a push OR pull.