The options are almost unlimited, personally I like a holster that's flexible and soft. I normally carry at the 3 o'clock position and the softer holster don't dig into my hip bone. The holster I've used for the last 4 years is a Houston brand IWB, very comfortable.
And note I have a box-o holsters, esp leather ones (will NEVER buy another one). My glock 20 CC holster was likely 60+usd when I bought it 16+ years ago so I'm not some cheap skate.