i was thnking of getting the esp kh-2 ntb and i was wonderin if i get it should i keep the 81 in both positions or should i change the neck pickup to an 85 or 60?

why waste money like that? if you have em, then go ahead if you dont like the 81. play it first and make sure you'd rather have an 85 or 60 in there first.
Jackson RR5 ivory w/ EMG 81/85
Jackson DX6 w/ SD Distortion & Dimarzio Super Distortion
Fender Starcaster Sunburst
Mesa/Boogie DC-3
Johnson JT50 Mirage
Ibanez TS-9
Morley Bad Horsie 2
Boss CE-5

ISP Decimator
Boss DD-6
Korg Pitchblack