Just to let you folks know I installed a fresh OpenSuSe Tumbleweed with
latest things and it is FAST. Designer works without any glitches and is
fast too - way faster than with OpenSuSe 12.3.

This one comes with high recommendations - with only a few days
experience though so a pinch of salt should be included

Also remember if you want to use Nvidia's (or other?) own drivers you
need to do it with Nvidia installer. There is no Nvidia repository for
Tumbleweed because it is supposed to be more cutting edge. Still I would
lightly recommend proprietary drivers since it made things faster for me.