Hi... now sure what you plan on streaming but the NowTV box works well with iplayer, itvplayer, 4od, and 5od... it can also install Plex that can stream any of your own media in a really nice way... for £8 delivered (£2 cashback using Quidco) it's a steal!
I got it to use with our non smart TV and works a treat!
- also there is no need to sign up for a sky subscription ever...