Hi, i'm looking for some advice on what to buy as a replacement antennae for TV.

I've been using a Draco Digital Outdoor Antennae (Model ANT200) for about 10 years and it was fantastic until it recently failed (It got waterlogged).  

I'm in Wellington and have a clear line of sight through to the transmitter at Kaukau, which is about 6km away.

Could you please recommend a replacement?

Thanks.