IMO cables don't make that much difference anyway. Unless you're actually using, say, a true balanced system and running it through RCA only. You'd want XLR recabling in order to use the full potentials of the MK VI+ for instance, David wrote so himself in an email when I asked him a few questions about the amp.
The A18 however sounds great even with unbalanced. I'm running it balanced right now though since I sold my Signal RCA cables.
Yeah, but even then I need to get a balanced headphone cable (would rather not just re-terminate stock cable) and XLR cables which, as the cheapest, will be about $150 after postage (I honestly think going DIY honestly won't be much cheaper, that and I suck at soldering). Getting the cables that I really like would be around $350, however, I know in the end I will get them, so I don't know whether to go cheap now, try to re-sell and then upgrade, or just go all out now. If I go all out now, it will be months before I can get the Little dot MKVI+ if I decide to go with that (have to save for it, then there is the 3-4 week build time). I really wish there wasn't such a long build time for the MKVI+ but I understand why.