i've compared them to amperex 7308 & sovtec 6922s in an arc ls5 & an arc vt 130. i think the 7308s have more air but the midrange & bass are comparable in my gear. i'm now running 7308 in the ls5 because i've got a particularly well matched set but the vt 130 has the ei's & seems quite happy for much less money.
regards,
jon
regards,
jon