re: Miter Saws: Sliding vs Non-sliding / What should I know?

I did trim/finish carpentry for years and always with a DeWalt DW716 12" compound miter saw. Tried 12" slider saws and for really precise work they simply don't do as well plus they need a bit more space to setup. I have 10" single bevel miter saw, also a DeWalt and better for smaller work and shoe mold. Big dimensional lumber and shelving boards I've always used a circular saw anyway. A 10" slider would probably be the most useful for you as the extra width in cutting capacity is probably what you'll need more than fitting stain grade cabinet crown.