Podster
Headphoneus Supremus
if you dont mind slightly frustrating UI; the xDuoo X2 w/ Topping NX1 or Colorfly C3 also w/ NX1 sound like a dream, especially if you shove the xDuoo into 'Rock' EQ preset.
i'm hoping to get an AGPtek H01 in the next week or so, dont think that will need an amp for Havi, supposed to be very powerful on its own.
btw, i'm on my 4th pair of B3's in about 2 years, mine seem to suffer the hairline cracks in the earpiece , which results in a channel dropping out after a while, not experienced the cable issues you've had.
Now this may just be my ears but I've run my C3 with NX1 and my NX2 but ended up liking the Xduoo XQ-10 just a little more!
But not to forget which thread I'm in this is turned out to be a powerful enough combo for my B3's