I would buy the Canon HV20. While I am not a fan of the HDV format in general, but it is really the only viable HD option for you. As opposed to the VX2000 (which is already 2-years old), the HV20 is brand-spankin-new and should workout well for you for many years to come, as well as allowing you to be (relatively) on the cutting edge of video production with it's full-res 1080p CMOS chip.
HDV is a finicky beast due to the constant computations the camera's processor must do to compress the information that the HD chipset is trying to squeeze onto a legacy format (miniDV tape). Some might argue with that legacy format comment, but I think you will find over the next couple of years EVERYTHING will switch to flash-based storage media. But, I digress. Just remember that because of this compression, you need to adjust how you operate the camera: keep pans slow and smooth; when you can, stay away from reds and whites (i.e. in planning wardrobe choices or locations to film in), etc. There are numerous articles on cinematography forums about how best to utilize this format.
As someone mentioned earlier always use the same tape stock... buy large quantities at a time so you always have some on hand. Sony makes great media. Stay far away from Panasonic tapes, as they use a powder-based lubricant and if you have used any other brands... powder+liquid=gunk on your heads. DO NOT EVER leave tapes in the transport. People may say this is hogwash, but I have seen ruined cameras because of this. It has to do with the fact that the mechanicals are stretching the tape across the head, this creates tension and thus wear and tear. Be diligent about using a head cleaner tape. Again, use the same brand regularly and clean the heads every 5 hours of recording or so and you will be very happy man. The tapes are not that expensive and you can use one many times before buying another. Get a good carrying case and USE IT.
In the end you will have a really great camera with a lot of bonus features (3Mp still photography, analog to digital converter i.e. use the camera as a bridge to capture VHS recordings you may have already, fantastic Canon sensor, 24p mode, and all the technical knowhow that goes into Canon's more prosumer equipment) that will not be obsolete any time soon.