RE: Edge 540
The safe money is on ChuckW's advice...
Having said that, after a 20 year break from the hobby, I jumped from my trainer into a U-Can-do 40 as my second airplane. However I was a club instructor pilot in 1989, and spent many hours on the simulator in 2009. Even so, my cautious side said I was pushing it a bit, and my first few flights with the u-can-do were less than relaxing...
My advice - No matter what you fly, its always nice to have a sporty little plane that you can throw in the car for days when you want to get out and fly with too many hassles. If you think you are that good, I would strongly recommend something like a GP Super Sportster before you go to the Edge. You'll gain a lot of confidence with the SS and odds are you'll want to keep it even when you get confident later with your 3D