I find I actually prefer a high quality prog house radio station for journeying, like Frisky Radio. It's gentle and uplifting and driving... takes me right up to the point where the sound ceases to exist... then brings me back gently with a pulsing bass and sound imaging that often creates beautiful geometry that pulses in time.
I've tried Shpongle, Infected Mushroom, Tipper, lots and lots of things. The problem is always that they are too prone to rapid change that can be jarring on both takeoff and reentry. Chill music can be too washy for me also and tends to be pointless or confusing.
The nearest we ever come to knowing truth is when we are witness to paradox.