I use the coir fibre baskets, but I line them with some plastic, just enough to keep them a little bit damp in the long summers - I don't water them much
I also use terracotta pots to put those top heavy characters in, without actually potting them into it. It's more like a cache pot, but they generally don't have holes in the bottom. It doesn't really matter if the pot is too deep, this just helps the stems to stop flopping over, and the weight of the pot keeps them upright. I mostly shy right away from plastic pots - unless they're really small.