At 260 pounds I would say I did not like the lack of passing power of a 650. I'm 6'-4" tall, 38" waist, 51" chest and my old DL1000 limits my passing ability. Its really not a powerful bike at 90 to 100 hp and 550 pounds plus all the luggage and bolt ons you add. There are times I would like to pass a slow truck on a mountain road and don't have the power loaded with camping gear. I would not be happy with less power at all in a twin like a Strom. For touring my old FJR1300 had enough power to me, not too much, not too little. I could always pass when I wanted on my FJR, I could pass when I shouldn't have too, but its fun winding them out sometimes. I switched to the DL1000 since it handled dirt roads and camping better.
But, really.... your the only one that knows for sure. I went through a phase and rode my thumper all over when I was 36 years old. My main bike at the time was a DR650, thats about 35 hp. It was fun actually for a while, I just took my time. I also had heavy fast ST bikes and a KTM950, yet I liked my little thumper for some reason even cross country. But I had options, if i had one bike it would not be a 650 anything. Gotta have a bike with decent power when I need to get somewhere quickly in comfort. But, its all personal preference, some guys get by with a Ural side car rig at 50 mph.
If I was shopping new it would be a DL1000 no doubt, fresh design. The old ones have better forks and gearing for relaxed 75 mph cruising. I can run my old 06 Vee at 4,000 RPM all day in 6th at interstate speeds and its relaxed, easy on the engine, no drama, still has passing power. Decent pull to 90 mph plus in 5th, so you can promptly go around a fast cruising semi truck and get clean air etc....
Ride both as used examples and decide whats good for you. I like to use the same dealer for purchasing over and over again, that way they let me have test rides!