Here are some of my concepts. I've gone for something that's fairly clean and simple, yet striking. Creating an icon that works well within the logo or as a stand alone element, one that can be used for things like favicons or watermarks.
With #18 and #19 - its actually an R and 3 combined ... if you separated the elements, the R would be the left green stem + the top right darker colour. Then the 3 would be all the elements on the right. Hope that made sense :)
The logos are 100% vector so will scale well to any size, and works well in full colour, B&W and on coloured backgrounds if needed.
It would be my pleasure to work up any variations so please do say. I look forward to your comments or thoughts.