Tough question, the problem is what makes a good IMAC is not the best for 3-D. The GP Wagstaff is smooth and and precise and a wonderful IMAC platform, it will also 3-D fairly well. The Kangke Texas Hurricane is much better at 3-D and will fly an IMAC sequence fairly well, but not as good as the Wagstaff. I have never flow a plane that was great at both. To fly IMAC it's best to have a clean airframe that will hold constant speed through all the maneuvers, for 3-D the ability to rapidly bleed speed is an advantage. You should decide what you like best and lean in that direction.