IMO useing a consumer camcorder you would get very little, if any improvement by spending more on the pro tapes.
Some tapes have a chip in them that stores details of time/date/duration etc of each recording but can not be read by all camcorders and these tapes can cost double that of those without.
When you decide on which tapes to use make sure you stick to just one make and type as the heads on DV cams are very small and the different coatings can mix and cause the heads to get clogged. This can then result in a very costly repair
Mark.