Space-r: Switchcraft is great too, but a little difficult to get in Europe. I've used both, and found them to be at the same level (jacks, that is - I've never seen a Switchcraft XLR over here)
well, both. Female for input, male for output. Depends on the application what you need the most - an x-channel mic pre wants equal amounts, a splitter more males, a mixer more females. Panel-mount, as in front-panel mount, would be mostly input so that's female.
The combined XLR/jack is listed at the Neutrik site as the "combo" line. But, once again, these are a littlen fragile on contacts and wear (although still good).