I'm looking for an updated version of an old AKG headphone.
I think so too. Amazon reviews suggest the AKG K450 are more balanced (sound wise). It appears that the AKG K460 is the bassy one (similar to the K26P) and they want nearly $100 for them.AKG 460? I have a pair of 26Ps. So much bass from such a little headphone.
The open ones (old K24P, K412P) are K420, and the closed ones (old K26P, K414P) are K404.
The new K402 are not the newer K24P as one might think - they are a cheap toy.