Re: SM81 vs NT5
Close micing cymbals unfortunately eliminates NT5 due to its inability to cope with higher SPL.
For the purpose SM81 is a better choice.
There is, however NT5 'version' with pad which works perfectly. (Rode site is not responding, so I can't give a model name).
(Edit : Site available !! It's NT55)
Even for hi hat NT5 isn't the right choice ... I learned that the hard way 
SM81 is also the only Shure mic without a 'K' in the model number, that I remotely tolerate.
Really good and not too expensive choice is Beyer's MC930.
Credentials : I own and frequently use all 3 of the mentioned mics. Sometimes in large quantities.
