I think that "nearly any" brand of engine in the size range your asking about is suitable. Many people have their own preferences. They think that since their engine runs well for them, that particular brand of engine is the best.

Pick a brand. You will probably find that the one you pick is perfect.

One brand I will suggest staying away from, in the .40/.46 size range, is the Tower brand. There have been hundreds of complaints about Tower's .46 engine. I have first-handedly seen several of these engines give people constant problems, and would have to say that it's an engine I would never buy.

For further questions on this subject, I would recommend going to the glow engines forum.

Good luck,

John