It would be wise to consider spending the extra $$ now on HDV rather than investing in a technology that people are making the move away from. You can always produce SD video with HD gear, but not the other way around.
On the other hand, there are just going to be more and more bargans on SD gear as the move to HD progresses.
Gary Kleiner
Learn Vegas and DVD Architect
http://www.VegasTrainingAndTools.com