Where do I get balanced cables for these? Asides from mrspeakers website?
Impact Audio Cables - Great option if you're on a budget.
Ursine Audio - Another great option if you're on a budget.
Toxic Cables
Forza Audioworks - One of my personal favorites. One of the only places I've found that have the excellent ViaBlue 1/8" and 1/4" connectors (at least I like them).
ZMF - Zach just designed an all new cable that's supposed to be nicer than their current top of the line OCC cable. Should be released sometime in January.
Cardas Audio - You may have to contact them to see if they have MrSpeakers connectors.
Norne Audio
Moon Audio - Expensive but seemingly good option. May be hard to justify the price based on offerings from other makers I've listed above.
Effect Audio - Good option if you have more money than god.
Kimber Kable - Another good option if you have more money than god.
Update on the ZMF cables in a conversation I'm having with Zach:
"We will most likely be getting rid of our "basic" OCC cable that is available now, although I am not 100% sure of that yet, and then we will have two wires, a 105 nylon insulated litz occ in 5N copper that will be available up to 9.5 feet, and a 511 strand 7N litz copper that will be out flagship. The 105 strand will most likely start at 150 usd and the 511 strand (per conductor) at $399.99. The latter will have some wood parts on the cable as well.
Basically I found that finely stranded copper sounds "easier" to the ear and the notes "pop" more with a blacker background. So I wanted the most strands as possible while still keeping the cables malleable and nice to the touch."
EDIT: Q-Audio - Haven't tried them but the cables and connectors they use look nice.