If you want to upgrade your home entertainment system, it might be time to make the change to a home projector instead of a TV. And though October Prime Day deals ended recently, upgrading might not cost as much as you think. Currently, Amazon is still offering a $200 discount on the second-gen Samsung Freestyle, which drops it down to the all-time low price of $598. But deals can come and go pretty rapidly during major shopping events, so there’s no telling how long this offer will remain available. Get your order…