I think I was the first person around here to get the 1964-T back in the day. And at the time they didn't even have the quads developed yet, so it must have been the first set of 1964 Ears customs on this forum. Wow, since then I'd added quite a few CIEMs to my collection, but the 1964-T is still something I enjoy using.
And now I've got the new V3 in. It arrived yesterday actually, very fast shipping. The fit seemed off at first but it was my fault - I had just taken a shower and that always makes my ears tighter. Once I got everything back to normal, they fit very nicely and sound great too.
Unfortunately I didn't get a chance to take pics. They really do look great though - solid black shell with a brushed aluminum faceplate and 1964 Ears logo in "Side Modern" font.
Off the top of my head, based on a bit of listening on a Sansa Clip+, Meizu 4-core, and a few other players (but not the big home setup): The signature is not drastically changed from the original, but I do think it has more clarity, more bass extension (and a bit more presence though probably still not like the quads), and is generally superior. I also notice a more spacious feeling to the soundstage, which is something I kind of expected based on the 3-way crossover (the original was 2-way). More than that will require more time spent listening, but for now I can say it's a really nice IEM and a worthy replacement in their lineup.