I found, to my continual surprise, these 10x3.8 Quanum CF props to be the best. HQ makes some 10x3.8 plastic props of the same exact shape that are also quite good. The t-motor antigravity 9" props you were using earlier I found also to be quite good, but too small for my use. These size props are disappearing left and right off the market so I'm not sure what is best for what it readily available 
