For what it's worth, I sold my DL650 V-Strom and now own an '07 Bandit 1250. Not because the DL650 isn't a great bike, it is. It's just that I found that I would be riding 2-up after all, so my choice, like you, became between the DL1000 V-Strom and the B1250 Bandit.
Considering I live in the backwoods with a dirt driveway and a 1/2 mile of gravel road away from the pavement, the practical choice for me would have been the Strom. But the Bandit seduced me with her inline-4, fuel-injected, water-cooled power and outstanding handling for a "standard" bike.
I have ridden a friends DL1000 also, and I pretty much agree with most of what Vlad said, except I think Vlad was comparing the Strom to the last generation (air/oil cooled) Bandit... so I'd say compared to the '07, it might be a bit different.
Vlad said: "They both handle very well. Strom inspires slightly more confidence." To me, the B1250 feels much more solid in the twisties, and tracks very true. The Strom was flighty in the curves with a tendency to turn in, and wandered a bit.
The riding position was very upright, I actually prefer a slight lean forward, so the Bandit is more comfy to me. And the Bandit feels more like you're sitting
in the bike, as opposed to sitting
on the Strom.
Power is not even close, the Bandit has gobs of it. And the Strom vibrated quite a bit, as most big V-twins do. The B1250 is so smooth you'd think you were riding a jet.
Both are fuel-injected and water-cooled, but the DL1000 has a reputation for drivability problems in it's FI system. Some say a re-map cures it, some have given up and just live with flat-spots during acceleration, coughing and stumbling at midrange rpm's, and a tendency to run crappy randomly. I hear the newer models are better, though.
Both Stroms are MUCH better on gravel, but the DL650 is the best. And it vibrates less, and has plenty enough power for solo riding plus gear. So I agree with Vlad... take a good look at the DL650 V-Strom. With the money you save, you can get a lot of accessories too.
BUT... if you plan on staying on the pavement all the time, the Bandit 1250 will spoil the crap out of you and turn you into a torque addict... and you'll be doing a lot of waiting for your wife to catch up at the intersections.