Herbaliser:
RC, regarding the advantage of the runflats on the Romanian roads - I think it's the contrary. I live in Bulgaria where we have pretty much the same terrible roads. The runflats are a huge problem for many BMW owners here - especially those with the X5 M-sport option and the 20"/325 rear tires. The runflats might be considered safer but they deform very badly on poor roads. Another problem is that their strong side walls transfer more of the shock's energy from the road to the suspension causing its quicker amortization and bad comfort.
So, for our region my choice would be something like LC200 V8 :)
The Bridgestone Dueler HP Sport is a sport tire, not really an off-road or even heavy duty tire. The "deformation" actually isn't a specific RFT problem (despite the stiffer side walls) but a problem of the overall bad roads over there. So I would actually prefer having a RFT tire in Romania/Bulgaria, even if this means that I have to deal with "deformation" problems which of course result in nervous steering behaviour and other issues. I had three flat tires in Romania, never ever had one in Germany or any other country I was driving in (which of course doesn't mean it can't happen but...).
I also remember that a collegue was driving 160 kph on the "Autobahn" from Bucharest to Pitesti when he hit a pothole (which hasn't been there a couple of days earlier, my collegue was driving this route pretty often) and the rim (!) of his Mercedes stationwagon broke and he barely escaped this without hitting something. A warning was issued that recommended steel rims instead of alloy rims but even at that time, most high quality cars had alloy rims as standard and there was no way to get steel rims. 
I agree, none of the current luxury high performance SUVs is actually made for very bad roads but I guess nobody with money in Romania would actually drive around in an ARO. 
As to ride comfort: yes, RFT tires provide less comfort, especially on bad roads and the air suspension of the Cayenne Turbo surely is a plus regarding that. On the other hand, I said it before, I would probably drive a modded BRABUS G class in Romania, black with dark tinted windows (for "pschological" reasons 
). BRABUS offers special heavy duty packages at demand, incl. huge power upgrades and special tires. Since top speed isn't really important in Romania/Bulgaria, I would choose a 700 HP Brabus G-class, heavy duty modded, over actually ANY SUV on the market. As a hint: 0-100 kph in 4.3 seconds, the right heavy duty truck for bad roads where top speed isn't really important.
In the last year of duty, I was driving an ISUZU Trooper 2.7 TD instead of my former Lancia Delta HF Integrale or Mercedes 190E 2.6 because of the bad roads. I can't say that it really helped, after strong rain falls, I drove through high water and "destroyed" my frontlights and half of the electrical system.
Unfortunately the Brabus G V12 S Biturbo costs around 350000 EUR, so maybe it would be the better choice to buy a Porsche Cayenne Turbo and a BMW X5 M and drive them both instead.
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RC (Germany) - Rennteam Editor Porsche 997 Turbo, BMW X5 M, BMW M3 Cab DKG, Mini Cooper S JCW
The X5 M interior is indeed a bit boring and BMW could have achieved a sportier chassis setup, especially with different tires. On the other hand, the Runflat tires have a huge advantage, especially in Romania. 
