Seems to be the going thing from what I see. The MK2 with a 7M is getting common now and now the MKIII with a 1J is becoming common. I guess it depends on what you think is best for you. I dont really care to rev above 7000 RPMs, and the 7M has plenty of Power if you know how to build it. Reliability is on the builder. You can build it to be the most reliable engine you can or you can build it to run the balls out of it. Either way sooner or later maintance is going to have to be done.