Shoppers looking for a budget-friendly 4K TV for gaming and HDR streaming cannot go wrong with the Roku Pro Series, which is now down to an all-time low price on Amazon. All three sizes of this TV have received hefty discounts of up to 34% on Amazon and Best Buy. The 55-inch is a particularly excellent pick if you're on a tight budget, coming in at just $598 for a 4K 120Hz TV with Dolby Vision and mini LED backlighting.