Recommendation for speaker cable to use with Magico speakers

Personally, I would ask your Magico dealer to recommend something more modestly priced to start, with a trade in option on the Reference if you decide to upgrade later. Once you get everything broken in, you can audition the reference and see if it’s worth the extra $$$. It’s good to negotiate a trade in price at the beginning when the dealer is motivated to make the sale. I believe transparent has an aggressive upgrade program you should ask about. 

If you find them lacking extension in the bass Mogami.

Hi - which model do you use? Regards

I use Magico A3's from the first production run. I formerly used Audience AU24SX speaker cables, which were very good, and then tried Silversmith Fidelium's. End of memo; they stay in and won't leave. Outstanding cables and reasonable priced. Neal

One of the appropriately priced JPS Labs speaker cables (an older or a new model) would be a brilliant choice for your setup!  On my main extremely revealing audio system, I use JPS Labs Superconductor 3 speaker cables which I've been using for over 15 years now, with no plans of replacing them.   I just replaced/upgraded all the cables in my entire system except for my JPS Labs Superconductor 3, which gives you an idea of how highly I think of them.