Okay, you should enjoy the E-Maxx a bit more. Did you get the brushed or brushless Maxx? Are you having issues with your first truck, or do you just not like the cost/waiting? If the ESC/Motor combo are still running fine, you could throw them in a better roller. I don't know what brand your...
Like Bamafan stated, you're kind of "left hanging" when you get the brand you did, and you would't be the first person turned away from the hobby because of it. With that being said, some things may swap over. What exactly are you looking to do?