Sliding miter saws offer the advantage of crosscutting boards up to 12 in. wide while still providing all the benefits of non-sliders. They're available with blade sizes ranging from 7-1/2 to 12 in.
One thing you swiftly learn when you become a professional laborer is that the major hardware brands not only sell a lot of different tools, but they don't always do as much as you'd like to ...