Ah, yes I mean ESSM Blk II here, which I believe has an active seekerhead for terminal homing rather than offboard illumination all the way (current version). As I say I kind of hope the extended box/canister iteration gets a close look as it strikes me as being a little more future proof in terms of the weapons it is likely to be able to accommodate.
AMRAAM is a fine and extremely capable missile, but with the D model being the last major iteration of it set to be produced, I doubt the slammer will represent the state of the art over the
entire service life of our NASAMS batteries. Just my 2c.