I'm looking to get more into the sport and I feel like it's time to upgrade with a better radio. I'm ok by spending 400 on something that will make me feel more connected with my cars. I have 4 spektrum receivers and would like to use them along with a lipo hump pack. I heard mixed reviews on futaba and don't know much about airtronics. If I'm going to put this kinda of money into a radio I would just like to get some feed back. Thanx