Prices online are accurate unless you need insurance or a GPS or similar extras. You can get an exact price on the companies’ sites directly rather than through a travel aggregator. Really all the major ones are fine. The cheaper ones like Rent-a-wreck usually are not in the main rental car center. You may need to wait longer for a shuttle. Cheaper options like Fox are in the rental car center but you may wait in line longer or have worse service. Reality is rental cars are a commodity though.