In C has some interesting performances e.g. the versions by Paul Hillier and by the Shanghai Film Orchestra. But the most radical may be by flutist Hans Bender where he plays each fragment once on flute. This probably works better if you know the original.
Here is a good quote from Riley (from a 1977 Mother Jones/Real Paper article):
My own feeling is that if people aren't just carried away to heaven I'm failing...I want to create a kind of concentration on a musical idea so that people can go inside themselves and comfortably follow the development until they slowly rise up and disappear into the clouds.
The 53 Patterns of Terry Riley...