Agree it is serious porn! I'm glad other people see it the same way I do.
I'm lucky to have a 450RR and previously, I had a 690RR. You are right to lust- the balance of the bike is amazing. Most bikes can be gotten most places, but the rallybikes actually perform well almost everywhere, from freeway to trail. And they aren't delicate- even the 450 version is good for many thousands of miles with minimal maintenance.
The stock 701 is pretty good, but it isn't much fun on the freeway with no wind protection, and the suspension is limiting in the dirt. All the twins make hardcore dirt more work than it needs to be. So I agree, that 701 rally would be the right bike for so many of us.
I've got a 690cc rally motor to put in my 450 whenever I get around to it, the frames are the same. I thought the 450 would make a lousy touring bike, but the reality is, it works pretty well. Only the 5 speed gearbox is problematic- geared for technical riding (15/48 or so) it is happy at 60-65 rather than 70-75. I'm headed to Baja with it early in the year and really looking forward to a good wander.
Here's a pic of my old 690 in Baja, that was a neat bike. It struck an incredible balance between agility and stability- it turned really well but went fast in a straight line even better.