I think the "mediocreness" of the E-revo axles and diffs is not an issue with normal usage. Especially since they are very cheap and easy to replace. I also think that since you will need a brushless system, and radio no matter what, go ahead and get them. Slap them in your E-revo and see what you think. If you then find you have issues , sell it and get something else, perhaps with extra money. I just don't see how your gonna get a more reliable , brushless ready vehicle, for what you could sell your E-revo for.