TCL TV reviews TCL 6-Series Roku TV review (US): The TCL 6-Series is the best TV under $1,000, period. ... TCL 6-Series 4K QLED Roku TV review (US): The TCL 6-Series remains one of the best budget TVs you can buy thanks to its beautiful 4K HDR performance and inclusion of high-end AV formats like Dolby Vision.