[9fans] How useful is a scroll wheel?

[Caleb Malchik]

I'm considering buying a Logitech M-S35 to help me learn sam/acme. My 
only worry is that I'll wish I had a scroll wheel. It seems that 
clicking the scroll bar whenever I want to scroll would take some focus, 
and I shouldn't have to shift my focus to accomplish something as basic 
as scrolling. Is there a consensus that scroll wheels make life easier? 
Does anyone choose no scroll wheel out of preference rather than 
availability?

Caleb