1 - Tavia. Don't remember what I paid, but it still works well & gets passed around to/from others alot.
2 Craftsman. 15 years old, still works well, take care of it.
3 Craftsman w/ swivel head.
4 Good luck. Don't go bottom of the price range, but not too far off the bottom and expect it to be a consumable. Otherwise you'll pay a ton.
5. Search around on how & you can build your own for way less money. A simple digital level & a straigt edge can work for camber & two strait edges & a tape measure for toe if you have time to properly seek them out.