I currently have mine set up as: Q, E, F, R, 1, 2, 3, 4, 5, X, C, V.
I would recommend using a modifier key such as Shift or Control, depending on which your hand feels more comfortable with.
Switch your turn keys to strafe, and instead get used to using the mouse to turn. It's much quicker, and is more accurate. Doing this will allow you to easily kite enemies in PvP and throw off their accuracy. It can also work extremely well in operations with AOE effects on the ground.
And if you run out of keys to use, you can use another modifier key, or you can buy a Razer Naga mouse. Those are $80 though, and I wouldn't recommend it unless you absolutely need it.
This setup will take awhile to get used to, it took me a few days of screwing up in game, but it was worth it over all for better gameplay. Just stay away from FP's and PvP until you have it down.