from http://www.carlgoldbergproducts.com/eagle2.htm

.29-.45 2-Cycle
.46-.50 4-Cycle

I would stick with a light 2 stroke on this one. It is not very heavy, and a good .46 will be plenty, but you could go lower without problems.

Why do you want to get the same plane you trained on? You might get bored. A Tiger 2 may be a better way to go. It will have more performance but still easy enough to fly for a new pilot. It can be had for about $170. I would go with a Thunder Tiger .46 Pro for this one.