If you have a 1.1, you don't have self-tightening motor mounts, so you're limited to non-self-tightening props. You have two real choices:
1) Wait for DJI's E300 non-self-tightening 9443 (Vision) props to be released. They're new, so only a few shops carry them at the moment. Or,
2) Go with the ebay knockoff "Vision style" props. Make sure you get the non-self-tightening (non-threaded hub) version. All ebay props you buy need to be balanced to fly well, so if you don't have one, invest in something like a Dubro Tru-spin prop balancer. The choice between plastic and carbon fiber is yours. Carbon is lighter and stiffer, but costs more. I prefer carbon myself, but I'm also waiting for a set of option 1) to test.