Depends on what you mean for "cross country". For me that meant being able to take me, Mrs. Steingar, and her luggage for a week. I can't afford the RV's that can do that (heck, I don't think I can afford the ones that can't). Moreover, I wouldn't buy an aircraft to travel with someone that's tandem. I like to be able to look at people when I talk to them. That of course, is me.
Were I in this particular boat (and had I the AMUs) I'd get two aircraft. The first would be a really good traveling machine, something with back seats and lots of room for luggage and that can haul a load. The second, small, fun and aerobatic. Probably experimental too. Quite a few to choose from, many aren't even all that expensive.
Anyone who says they can travel cross country in a Vans hasn't traveled cross country in a Vans, at lest the one and two place airframes. Don't get me wrong, they're GREAT aircraft. But lots of vibration and noise make for a poor cross country experience. I imagine I'd not mind that much. I suspect Mrs. Steingar would, mightily.