We've had a number of threads on this topic. Here is a sampling that is by no mean comprehensive:
https://www.quadraphonicquad.com/forums/showthread.php?t=2406
https://www.quadraphonicquad.com/forums/showthread.php?t=2929
https://www.quadraphonicquad.com/forums/showthread.php?t=2524
https://www.quadraphonicquad.com/forums/showthread.php?t=1876
https://www.quadraphonicquad.com/forums/showthread.php?t=1152
https://www.quadraphonicquad.com/forums/showthread.php?t=2406
https://www.quadraphonicquad.com/forums/showthread.php?t=2929
https://www.quadraphonicquad.com/forums/showthread.php?t=2524
https://www.quadraphonicquad.com/forums/showthread.php?t=1876
https://www.quadraphonicquad.com/forums/showthread.php?t=1152