I can't show you 4x5 but here are medium format samples:
Velvia 50 (RVP) http://www.flickr.com/photos/alanklein2000/tags/velvia/
Velvia 100 http://www.flickr.com/photos/alankle...ags/velvia100/
Velvia is tough on skin tones but great for landscapes. Good luck and have fun with whatever you use. It's all good stuff in the end.