I don't get it either. You have a bike that is acceptable for touring but you want a road bike for the next years worth of road riding for the reasons stated and then you want to use a less appropriate bike for loaded touring. Unless your existing bike is grossly oversized, or oversized for road riding, and you simply need a better sized bike you can put a different stem on to get you in a more aerodynamic position and lighter tires for more zip. When the tour starts you put on fatter tires and load it up.
If you simply need a better sized bike I'd suggest looking at the same category of bike as the Jake or an even heavier bike like a Cross-Check.