Qualities I am looking for... strength and ease of emergency repair, availability of replacement parts/components...cost $1000 or less...... upright seating position and comfort..(speed is not as important as scenery)
Any of the three would be meet these criteria fine. I would only pick the Safari (aren't they all 26" wheels) if you will be off pavement a lot, though. Making sure the fit suits you is key though.
Something to consider... I don't see why folks think an upright posture is more comfortable on a long tour. I agree that it may be more comfortable for a rider who doesn't ride all that much but on a multi-month tour there will be a lot of long hours in the saddle day after day. For that I find having all my weight on my butt and all the road shock going up my spine to be decidedly uncomfortable.
Would you tow a trailer? single/double wheeled? Or carry front & rear panniers?
How much will you be carrying? It is easier to keep the weight down without a trailer, however some pannier sets can weigh as much as a trailer. Arkel panniers for example can come in at over 15 pounds for front, rear and a handlebar bag. Add some seriously over built racks like the Surly Nice Racks and a trailer is much lighter.
My personal preference is to keep the weight of panniers and gear combined below 35 pounds (not counting water and food that are purchased only as often as needed. If you choose carefully that is pretty easy to do. Incidentally on some items it is easier to keep the weight down by using less expensive stuff. Others you typically have to spend more to save weight.
I find that racks and panniers can be pretty inexpensive and still be light and functional. Nashbar or Performance waterproof panniers hit that mark perfectly IMO. The Blackburn EX-1 rear rack and Nashbar or Performance low rider front rack do as well.
I find it worth splurging a bit more on tent, sleeping pad, and sleeping bag.