Need help selecting an engine for 3D flying.

I know little about all the engines out there so I need help choosing one. I have a plane that I was planning on using a GMS .47 or an O.S. .46 with a 12.25x3.75 prop on. "The GMS is supposed to produce more power." But I was hoping for an all up weight on my plane of 4.5 lbs. And right now sitting uncovered it weighs 4.5 lbs. So, I have roughly calculated/guestimated the weight of my covering will be 5-8 oz.

Now what I am wondering is how would the .46/.47 size engines I have listed pull this plane around with that prop for 3D flying? I plan on learning to hover and I want to be able to pull vertical from the hover without worry. Think either of these engines would be acceptable for the weight of 5 lbs.? I should also say that I live at roughly 5,000 feet elevation.

Now my next question is if those engines listed won't be enough to pull me straigt up from a hover with that much plane, what will? I've heard of engines being more powerful than the .47's and also weighing less. I don't really want a 4c unless it has more umph and weighs roughly the same as a .46 and also is in the same price range of the 2c.

Also I don't know if the plane specs will help but it has a wing area of 7.625 sq. ft. and I am looking at now having an AUW of 5lbs. Elevation is 5,000.

Thanks for any help,
Josh