The 60 with a 100 is a great combo. Plenty of power and then some. The 60 size Mojo with a 100 will have more power that the Mojo 65 with a 125. The 60 size is actually a little more stable in 3D flight than the 65. The 65 was designed to be a little looser. Of those two, given the choice I would go with the Moass Mojo 60. If transportation is a problem go with the 65/125 for the removable wings. You can get a removable wing kit for a 60 but it really adds weight.