Its quite obvoius what brands people are interested in.Just scroll thru the engine forums,and look at the views and replies.
There are some newer threads,that have 3X the activity than this thread.I still wonder why so many will buy a high performance airframe and good electronics,but then want to save on an inferiour powerplant.I know that many of the China motors appear to have very good performance at first,but smoothness and longevity is probably something they will all lack over the next few seasons.