IMO opinion, if you want to stay downtown using the blocks go with Tru by Hilton. Newer hotel, cheapest option, and really close to Bridgestone. Renaissance is a decent option too and is across the street from the arena. It's an older hotel, but recently underwent a remodel.
The Vandy/Westend area is a great choice as well. Its not walkable to downtown, but short car/lyft ride and a great "local feel" of Nashville.
The worst location is in the Opryland area. Longer drive to downtown and really not a lot of excitment in that area of town.