For me, it's GRT (Grand River Transit), They Operate (Currently):
21 1994 New Flyer Industries D40LF (Detroit Diesel Series 50 Engine, Allison B400R Transmission)
2 1997 Nova Bus LFS 40102 (Cummins C8.3 Engine, Allison B400R Transmission)
4 1998 Orion Bus Industries 06.501 (Cummins M11 Engine, Allison B400R Transmission)
2 1999 Nova Bus LFS 40102 (Cummins ISC Engine, Allison B400R Transmission)
7 2002 New Flyer Industries D40LF (Cummins ISC Engine, Allison B400R Transmission)
30 2003 Orion Bus Industries 07.501 (Cummins ISC Engine, ZF HP592 or Allison B400R Transmission)
19 2004 Nova Bus LFS 40102 (Cummins ISC Engine, ZF Ecomat Transmission)
14 2005 Nova Bus LFS 40102 (Cummins ISC Engine, ZF Ecomat Transmission)
14 2006 Nova Bus LFS 40102 (Cummins ISC Engine, ZF Ecomat Transmission)
24 2007 Nova Bus LFS 40102 (Cummins ISC Engine, ZF Ecomat Transmission)
15 2008 Nova Bus LFS 40102 (Cummins ISC Engine, ZF Ecomat Transmission)
6 2008 Nova Bus LFS HEV 40102 (Cummins ISC Engine, Allison EP 40 Hybrid System)
13 2009 Nova Bus LFS 40102 (Cummins ISC Engine, ZF Ecomat Transmission)
9 2010 Nova Bus LFS 40102 (Cummins ISC Engine, ZF Ecomat Transmission)
21 2011 Nova Bus LFS/LFS HEV 40102 (Cummins ISL9/Cummins ISB6.7 Engines, ZF EcoLife Transmission/Allison H 40 EP Hybrid System)
20 2012 Nova Bus LFS 40102 (Cummins ISL9 Engine, ZF EcoLife Transmission)
33 2013 New Flyer Industries XD40 "Xcelsior" (Cummins ISL9 Engine, ZF EcoLife Transmission)