NeweggFlash offers the TCL 55" 4K HDR Flat LED Ultra HD Roku Smart TV, model no. 55R617, for $649. Coupon code "NEFPBA14" cuts it to $529. With free shipping, that's $21 under our mention from two weeks ago and the lowest price we've seen for this TV. (It's the best deal now by $60.) Deal ends December 31. Features include:

3840x2160 (2160p) native resolution

HDR with Dolby Vision

802.11ac wireless

built-in Roku TV (with access to Netflix, Amazon Instant Video, Hulu Plus, more)

3 HDMI inputs