Amazon currently has the TCL 49-inch Roku Smart 4K LED TV on sale for just $329.99. That is good for about $150 off of the regular price of this TV, and also brings it down to its lowest price ever.
This TV from TCL is the 49S405, which is a 4K Roku model. It has Roku built-in, so instead of using some proprietary operating system on the TV, it's using Roku which is a pretty popular service and has a ton of popular apps on-board. These include apps like YouTube, Google Play Movies & TV, Netflix, Hulu, and many others. This is a 4K resolution TV, so you're going to get some great pictures out of this one as well. It does also support HDR or High Dynamic Range, and has built-in speakers that sound pretty good. So you don't need a soundbar, though one is always good to have.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap (usually $3.99) next-day shipping if you need it extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime. You'll get 30 days free (if you're a student, you get 6 months), and then it's $99/year (or $49/year for students). Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.