I did like 1115 a bit better than 1028, so 1122 is even better? Might as well order samples and see. =P I find OPA602, 827, AD797, and 4627 all equally detailed, but 4627 brings on the details with a bit more clarity than the others. Its treble clarity is also the best. All four give my M-Stage deeper bass than stock which is a big help for Grados and K701. They no longer leave out some of that really low frequency ambiance and effects in electronic music.