Been going mad recently trying to re-establish tv reception, which suddenly died a fortnight or so ago. We're in a very poor reception area, and could barely get telly till I fitted a masthead amplifier 6 or 7 years ago, since when we've been fine. But now we've lost reception completely ('No signal') and a succession of new amps has made no difference. So now I've decided to try replacing the ancient (and pretty crappy looking) roof aerial with one advertised as being right for Freeview. There seem to be quite a few on ebay and amazon, from sort of 20-ish to sort of 50-ish....but I really don't know what I'm looking at/for. 450W says one. 28 element says another. Anyone know what I should be looking for?