I am big Kansas fan. They may not be regarded as highly as some other prog bands, I always thought they sounded more coherent than Yes or ELP.
In a transcription book Kerry Livgren talks about how everyone had to really lay back and make sure not to overplay because there were so many instruments in the band. Phil's parts are appropriate for the songs and he is given time to shine on several tunes.
Cool drum break at the end of Belexes - http://www.youtube.com/watch?v=7kflsPW6m6A
Old school double bass and a drum solo in How my sould cries out for you - http://www.youtube.com/watch?v=6hpDJr4Wj5g