With Baby Boomers already rolling into retirement and Gen X looking forward to shrugging off the stress of the 40-hour work week, downsizing could be a strategic move. For many Americans, homeownership remains their single largest investment and the monthly mortgage payment their highest bill. Lowering or nixing that cost altogether can free up a considerable amount of cash that could be used for retirement security or leisure activities. Keep in mind, your "golden years" should be just that, so enjoy them. That being said, there are pros and cons to consider when deciding whether to downsize to a less…