A couple months before the 2010 EAA Convention, Sporty’s introduced their new SP-400 radio that includes a VOR and ILS receiver with display. The July 2010 Aviation Consumer magazine gave this unit the best review out of the Vertex and Icom units they also tested. Sporty’s has reprints of the article available at their show displays.
I believe this would be a very good radio for light sport planes, those without electrical systems. It can provide that ILS backup that isn’t available with other portable units. The Consumer Reports review stated performance was very good. Cost is $399.