I cannot assign css classes to radItems dynamically, If I do so I will have to add 15 - 20 css classes and their hovered states.
By modifying your code little bit(removing background image) I was able to completely highlight selected row and hovered row .
background-color: #C5C5C5 !important;
If possible, I would like to keep the background image that comes with skin and make it cover 100% row height.
Above code removes it.