Still doesn't beat Thermalright's Archon cooler.

Is there any chance of testing the dual-tower coolers with 3 fans? If increasing the airflow on one of the heatsink arrays improves temperatures by 2-4 degrees, wouldn't adding an additional fan to the second array provide similar benefit? If so, we looking at cooling performance equivalent to Archon.

I wouldn't fault the Mine cooler a lot for having its screws come in from the bottom of the motherboard. That certainly isn't as good as screws that are accessible from the top with the mobo in the case - but I doubt that many coolers offer that. With the mobo out, bottom screws are always going to be easier to use.

This assumes that you're using a backing plate, as I think anyone mounting a heavy cooler and wanting the best contact would do.

For example, my Xigmatek HDT-S1283 has top-entry screws, but I probably can't remove it without pulling the motherboard. If I could get it off, I could never get it back on. And even with the mobo out of the case the screws are difficult to turn. So I would much prefer bottom-entry screws on this thing.