Kudos to what he said def. get the Jammin it is great. If you don't like the Force .26 for whatever reason they do come with the Force .28's now for some more power. Or You can always get another engine like an OS .21 RG-X or the Sportwerks .26 which is fantastic. I had both of those in my Jammin Pro and both were great. I'd recommend the Sportwerks tho. =]