Order the 4.Ai + package and choose Buckey Burl (in the not section write all black/grey buckeye)
Megadeth sounds great with the 4.ai's. Dave's voice has a nice, clear defiance to it, and it feels as if the guitars have the right tone and balance to them. If I were you, I would try out the 4.ai's. I was a little hesitant at first, but man, these are really spectacular, and the customer service is out of this world.
I own a GR07 mkI: these are great for acoustics and old bands (which I don't know why). For heavy metal I'm still to find one iem.
Sounds nice: Led Zeppelin (specially the drums), Creedence Clearwater Revival, Kiss(acoustic MTV), Jimmy Page and Robert Plant (acoustic MTV), Blue Oyster Cult, Mark Knopler (but his more... country rock...), Steve Ray Vaughan, BB King, UFO, Michael Jackson (!), Judas Priest...
Strangest things, bands like Metallica, Megadeth, Iron Maiden, AC/DC... they lack something, although the detail is there, a good amount of bass is there...
Hope you don't mind me reviving this thread. I'm in the market for some new IEM's as my B2's just died. I listen to a lot of metal genres and I'm thinking of spending a good amount (limit is probably $500ish) to get a great sound.
I've noted that the 4R's are supposed to be great for metal and they have been superseded by the W40 - does the same principal apply here? any experiences with the W40s?