Thanks for all the feedback. The speed of the kKLR250 is plenty for my first bike and the commute, I won't need to go 75 on the kind of roads I'll be riding on, so the 350 would be a bit more than I need, and fuel economy is a big factor.
I've looked into the Super Sherpa because of the good rep it has but they are damned hard to find, and their price is a bit higher for equal year and miles KLR, I guess because they are somewhat rare. Plus their seat height is an inch shorter than the KLR.
So, looks like it's the KLR250 for me. And I'm stoked because it sounds like a great versatile bike and fun to ride.