Is it worth the $600.00 difference between the Exmark metro (fixed) and the metro HP(floating). I am getting a 48" gear drive walk behind(with pistol grips).Can't i adjust the front spacers on the metro(fixed) if needed, to change cutting height? For a gear drive is the fixed deck sufficiant? Has anyone used these? This will be my primary mower for this season, it's all i can afford to get started. Any input will be helpful.