KYB 2G is obviously the brand KYB by all accounts
AGX is the form you are describing with 8 way adjustable dial.. far too soft to be useful on lowest setting... decent at middle and you'll pretty much be driving around with it dialed in as hard as possible.
not sure where trust comes into it ... obviously with the info provided its a little unclear on all the bits.
KYB 2g AGX are used in some skylines but fairly rare so some pics would be great so verify my "beliefs" here.
if these are indeed what i suspect normal cost is around 230 a corner.
Danz