On indiegamer forums are debating again which graphic render is the best. Well personally I use PTK to make my games, so until 2 months ago I could just use OpenGL. Now that DX support has become available, I tried porting my game The Goalkeeper. Now you can play it both using OpenGL or DirectX (you can choose at startup). I can say that the number of sales has slightly increased. It’s too early to tell (just 2 months of data isn’t enough) but I am thinking seriously that having the possibility to run the game also using DX is a very good thing…!