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My first "proper" bike was a Surly Cross-check. It really does do it all. Lots of ability to attach rack, mudguards, etc for commuting and touring. Plenty of space for big, comfy tyres. The frame shape means it's really easy to sling over your shoulder to carry it up the stairs (I find it much easier to carry my cross-check up 4 flights of stairs than lighter bikes which I can't get over my shoulder easily).
I think you can get them with flat bars, but drops are more versatile.
@Philip_J_Fry
Yep pretty much what you say. I don't think she'd be bothered about drops, she'd not use them and see them as superfluous to her cycling needs.
Cheers!