Back when I first came around the Norton 4/8 was THE most used hone on SRP. Lynn used to wear them out regularly. Randydance told me that I should shave test on the 4/8 before finishing with a higher grit. If I wasn't 'there' at the 8k level I wasn't ready for the higher grit. I've shaved off the norton 8k many times and truth be told I could get along just fine if that was all I had.
If I could only have one hone (shudder) it would be a Norton 4/8. :)