Where to go? Can we get in?
Dinner next Friday night for four people...We're all in our mid to late 20's. One person is visiting SF for the first time, the others live here, and this may be the visitor's one major meal out, and yet we don't want to break the bank (entree's topping out around $20±). I want an emphasis on local, seasonal foods...A also think I prefer a place that takes reservations (ruling out Dosa, etc.)
This is a job for OpenTable.com! I'd check the availability of the places you listed, and see where you can get in -- I think any of them will make you happy, although I'm not sure the price range you mentioned is enough for some of them.
While Incanto isn't on Open Table, you can make reservations on their website. I've done it without problem. That and Range are probably your best bets of the list given your parameters. If cocktails and a full bar are important to you, choose Range (which has a great cocktails), otherwise I'd probably choose Incanto. (which has a very nice wine list). For light eaters, Incanto might actually be a bit cheaper: perhaps a few more entrees under $20, or you could have pasta as a main and keep it even less. However, Incanto can add up if you go the full app/pasta/main/side route....