If you shall have one hi-hat, i agree, it it the New Beat. It can be used for everything.
Pter Erskine uses it for jazz and it is perfect for rock too.
Ihave had a lot of hi-hats including a 13 K/Z but I sold it it is not very natural sounding with a very heavy bottom.
I have kept some hi-hats that i love:
I have an old open ink New Beat that I use in many different situations.
I also use Bosphorus New Orleans and it has become my favorite.
Zildjian K made in Canada at the sabian factory
Istanbul presplit Mel Lewis
My first quality hi-hat i owned was a 14 quick beat, and I regret selling it, it was very nice and crisp.