do you have a thread on your bike and your exploits with it? wondering if buzzing a long at 70mph for long distances is too much for the single cylinder. I've had a plan to ride to Bonneville for speed week in 2017 for a few years now to watch Indian try and take back their title, i wonder if the KTM is up to the 2400 mile round trip journey
With the stock gearing you can ride 70+ mph as long as your *** can stand it; which will be a lot less than you think.
Put a set of supermoto rims and tires on it, and the thing rips. Mix your trip up with a bunch of offroad and you will get the full value of the bike. This is one of the best 70off/30on bikes around. If you are not planning on much offroad there are better choices. If your life is more 70on/30off, I would look elsewhere for a more comfortable ride and better wind protection. The BMW 800 would be a nice bike, and you can pick them up used very inexpensively (bmw has terrible residuals). I put 60k on a 1200 GSA and loved it on road and off. (until I had to pick it up) The tenere is also a great bike for that mix. They are cheap, but I found them to ride big and heavy, and you get what you pay for in regards to an offroad capable bike. The DUC Multistrada always seemed silly as an offroad bike with that 17 inch front rim. But if all you will be doing is some gravel roads, then it wont matter. It would be the most fun on the road as well.
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As far as exploits go, I sold the GSA a few years ago and got a Goldwing for two up on road touring, and the 690 for the offroad stuff. Most trips are more up to the individual than the bike. On the GSA I was across the US and Canada several times, did the WABDR, went as far north as the Arctic Circle and as far south as Honduras. On the 690 I have done BAJA, the Continental Divide offroad from MX to Canada, the WABDR, AZBDR and UTBDR.
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So as you have likely found out, the options available and more importantly the different opinions on the subject, will consume you. But hopefully that is part of the fun. FWIW, we have now completed one of the greatest thread hijacks in a while. But since you are the OP I guess it is ok.