You can play whatever high quality bandwidth streams you can find through Open Network Stream. Isn't that enough?
How would you define good quality/high bandwidth? When it comes to Internet radio many stations don't even produce a stream better than 128 kbps MP3. Nothing WiiM could do about that. Radio Paradise when selected as a music service e.g. is lossless FLAC.
The station search on vTuner explicitly lists the available bitrate and compression algorithm.