I've been doing nail stamps for quite a while now and, if you want to stamp patterns in black, this is the only option I would recommend.
For other colours I would say you don't need to use Konad, but black and white patterns need the density of colour I've only found in these special stamping polishes.
If you want other colours, metallics often do well. Any polish that gives full coverage in one coat will usually be fine. I've found Barry M foil colours to be particularly good :)