Yes, I would like to experiment with DX11, too, but it is NOT a must for GStudio.

@Thomas: Yes, I see where this feature would come in handy for you. However, you are probably better off with using the following approach for your vegetation, especially without DX11: http://www2.disney.co.uk/cms_res/blackrockstudio/pdf/Foliage_Rendering_in_Pure.pdf
There you render the vegetation (separated from the game world) with alpha testing (thus solid and much much faster, esp. with many overlapping polygons/ models) and use an alpha mask to keep the smooth edges that you normally would lose with alpha testing alone.