I have used Proplan for about 4 years and found it excellent. I understand that Quckplan is a cut down version, but with all the main features. Proplan has an inexpensive monthky update service via the internet which ensures the data, frequencies, airspace beacons are always up to date. I would reccommend Proplan 4, the latest version, but it is more expensive than Quickplan. Why not look up the NavBox website?
Regards