A couple of words, AGD Mag.Mechanical markers do have their place, yes. But they're inevitably designed to be hard wearing and, from a firing mechanism point of view they're ..... unrefined. I've never seen a mechanical marker shoot high quality paint (save for a few very well tuned cockers) without issue, whereas you can rock up with an Etek that has the same level of ruggedness as any mechanical marker with the ability to shoot brittle paint.
I've never seen an Etek go wrong before, and that's saying something. They're basically tanks.