As has already been said bigger wheels probably will be the answer. You failed to state the size and weight of your plane and whether it's a tail dragger or trike. Trikes are particularly difficult in grass. Any of the 3 motors you chose are close to equal but if you went to the OS 46 ( (FX) that would be a lot better motor and of course more expensive. I have used them all and really like the Revelution a lot. It idles better than any and has power as well. Also I might add in this hobby what you buy usually lasts a long time so my opinion is don't go for saving a couple bucks in long run you come out ahead. Especially true with the radio portion.Each of us learn by experience and I have had 55 years of experience in RC and have often made wrong choices.