>>> I cannot access drama tv
I'm confused. Assuming that you're referring to UKTV's Drama Channel, it's available on Freeview Channel 20, so (assuming that you're using a 'normal' TV, with an aerial plugged into the back of it), you should already have it available to you. If not, try a retune of the set. If that doesn't help then your problem is with your aerial and not with your TV set (and is thus therefore likely to persist when you get a new TV).
[My post here explains why some people have certain channels missing from their sets and suggests a way of solving the problem:
https://www.theanswerbank.co.uk/Technology/Question1622528.html ]
A Now TV box effectively makes an ordinary TV 'smart' so, unless there are additional 'smart' features which you might need on a TV set that you're considering (or, of course, if you simply want to ditch the Now TV box), buying a 'smart' TV won't be of much benefit to you.