I put a high top on a tin top so it requires cutting. If I had had a sunroof or westy, it would have been perfect!!! There is a bus with a cool story on the samba where a couple replaced their westy top back when the bus was new and then took it all over the world. I think the bus goes by the name "Kermit."
If you can find a hightop roof, I highly recommend it! They can be expensive or hard to find. Sometimes they are thousands of miles away too. Good luck and let me know if I can help!