Hi Jen,
I don't know if your chid is a warm grower or cold grower, perhaps someone else here will know, Or contact the vendor.
Even if it is a coolish growing, this doesn't mean it can't take the heat, it just means it may have to go thru a cool down to get it to spike and produce flowers.
I've just recently repotted my cymbidiums couple weeks ago in peatmoss and perlite, it went very well and 1 is now in bud.
1 of them was completely rotted down, It now has lots of new roots starting.
Go with a mix you already know how to grow in if your comfortable with this.
Happy growing to you, enjoy ur new 'chids
