Your biggest issue with any new truck will be replacement parts, and most new trucks do not have huge aftermarket support for a few months after they have been released. When the truck has been around long enough for a second version to come out, the aftermarket support has usually caught up.
Yes, the three trucks you have mentioned look great, but of them the Savage will have the biggest support base until the other two get the aftermarket companies onboard.
So, do you get the cool new truck or go with something that is relatively established? Tough call, but yours to make. Were the choice mine, I'd buy the Savage and give the two new guys a chance to get established before dropping any coin on them. What's the use of having an RC if it breaks before replacement parts are available? They do make pretty nifty paperweights, but that is entirely no fun.