Recently I've been using grunt-modernizr, which is pretty fantastic as it can be set to build a modernizr js file based on the classses that appear in your CSS or JS, as I've been trying to move away from HeadJS. While this post might be a bit antithetical to the point of Modernizr, there are plenty of reasons why to detect IE versions
|IE8 and below||csstransforms3d||.no-csstransforms3d|
|IE9 and below||subpixelfont||.subpixelfont|
|IE9 only||csstransforms3d subpixelfont||.no-csstransforms3d .subpixelfont|
|IE10 and below||borderimage||.no-borderimage|
Note: borderimage, csstransforms3d are a core detect. Please note these detects are not IE exclusive.