The answer to 'should I get central air or' is that central air conditioning is generally the better choice for most homes. Central air provides consistent, whole-home cooling and dehumidification, which is more efficient and effective than window units or portable ACs.
Central air systems have the benefits of being integrated into your home's ductwork, providing even temperature distribution throughout the house. They are also generally more energy-efficient, quieter, and less obtrusive than window units. The upfront cost is higher than a window unit, but central air can increase your home's value and provide long-term energy savings.