I picked up a chromecast at weekend, and don't think there's anything even close on price that betters it - but it does depend on what you want to do.
I've got mine controlled via my old 2012N7, which is about the only thing that old tablet is good for now. It'll happily stream youtube, iPlayer. Also have videostream running on the N7 and laptop, which means that I can happily stream the hundreds of movies I have on my laptop.
Brilliant device. Absolutely brilliant.