I agree kinda agree. Although it would be nice to see a second tag with mono spacing and no syntax highlighting for quick use I think it would make the average quote look not so good. So perhaps instead if another tag was added which made the text in monospacing but with no background color. For example, I could use the following text:
[mono]test first line
testing another line[/mono]
And the above would produce the below but in monospacing:
test first line
testing another line
Would be nice because then we could display things that are not code but need to be in monospacing.