First-time repotting - Substrate questions

[Bloop]

Hi, I've been putting off repotting my Phalaenopsis because I can't settle on the right pots and substrate mix.

What I've generally gathered is that the phals would appreciate a mix with larger bark... Also, I might benefit from having something that retains a bit of moisture for them so I don't have to worry about watering quite as often.

The phals are receiving light from a south-facing window but are kept out of the direct sunlight. I mist them usually every morning, and my apartment usually has relatively high humidity (around 70%).

I currently have the Phals in clear plastic orchid pots inside decorative ceramic pots, which has worked well, but they've outgrown their pots.

I'm weighing the pros and cons of net pots vs. the plastic pots with slits in them. From what I've gathered, the net pots are better for orchids with pseudobulbs, unless you want to keep up with very frequent watering.

The substrate mixes I'm looking at are Schultz (I was going to use this one, but I just opened the bag and it was covered in mold), or Better Gro. I could also get Aussie Gold if I ordered it online.

Alternatively, I could make my own mix if I really knew what to put in it besides wood chips.

Any recommendations or opinions on this?

Thanks.