I have the Gaming 5, does what it is supposed to. A decent alternative to the ASUS Z70A Prime. The Strix is a good middle ground, and they offer like 5 different revisions.
I would have to check on the IX but my last Hero VI board had everything but reasonably placed fan headers.
Hero VI : 5 total, Two for CPU, one for rear exhaust, one at the top right of the board, and one at the bottom right. Basically any case with a dual front fan config was covered, but if you had any top mounts you had to pick and choose or use splitters.
Hero IX : 6 total, two for CPU, one for rear exhaust, one at the top middle (next to the CPU fan headers), one at the right middle, and one in the bottom right. So ever so slightly better.