The latest FAA Navigation Services, SatNavNews, has some good information about reducing the number of VORs and transitioning to RNAV and systems for NextGen. FAA Navigation Services provides the funding to purchase and maintain the FAA systems.
This information may assist you in decisions if you are considering new avionics.
http://www.faa.gov/about/office_org...ibrary/satnav/media/SatNavNews_Winter2012.pdf
This information may assist you in decisions if you are considering new avionics.
http://www.faa.gov/about/office_org...ibrary/satnav/media/SatNavNews_Winter2012.pdf