for a while. While I continue to be an advocate of the (digital) miniDV tape format - along with many prosumers and professionals (see the Sony HVR series in their pro line-up; Canon's GL, XL, XH and XLH series; Panasonic's DVCPRO digital tape series), the manufacturers have pretty much abandoned the miniDV tape format for consumers. Basically, at the consumer level, the HV40 is about it when it comes to miniDV tape and high definition.
It is not all about the media - but the video file type that is written to that media. There are a few examples of pro-grade camcorders that use flash memory - Sony HVR-Z7, Panasonic AG-HVX200, JVC GM-HY100 - but they do not use the highly compressed AVCHD MTS files and use less compressed file types (DV, HDV, DVCAM, HDCAM, XDCAM, DVCPRO, DVCPRO HD, even low compression MOV files from the HM100). Note the lack of internal hard disc drive camcorders at the prosumer or pro level. There are external hard drives (like those form Sony or Focus Enhancements' FireStore), but they generally connect to the digital tape camcorder with firewire and record DV/HDV or the manufacturer proprietary digital tape formats.
If you use a DSLR, then you understand what compression can do to the image data file. The concept is similar to video - but of course, different.
The Canon "Vixia" ("Legria" across the pond) camcorders are all essentially the same camcorders - if you take the storage media out of the mix. Add in the storage media, then you see the differences (HG is hard disk drive; HF is flash memory - both of which write to AVCHD MTS files... and HV is miniDV tape).
The HV30 replaced the HV40
Camcorderinfo.com has good info on it...
Beyond the digital tape vs flash memory (or hard disc drive) discussion, the question remains whether you want to archive the video, perhaps wanting it in 5, 10 or more years in the future and how you are expecting to archive that. If there is no need for an archive (or if you are willing to investigate RAID1-configured hard drive arrays), then perhaps flash memory is in order for you. In my opinion, miniDV tape is easier - and the "built-in archive" step is just icing.
One other thing... High definition video playback. Your Macs can edit and render the video out to the file types you identified regardless of the video source - and there is one more thing a miniDV tape based, high definition video, camcorder connected with firewire can do that the other storage media cannot: When the video editing project work is done, you will render out to various formats and media depending on your audience. You can also render that high definition finished project video out to the miniDV tape camcorder. This provides you with an archive copy in the full 1080 resolution - and store it in a cool, dry, place. Send the project out to the camcorder on another tape and you can connect the camcorder to a HDTV (with component + audio or HDMI cables) and playback the project in high definition, too...
Personally, I would drop the HG (hard disc drive) cam... from your list, the HF or HV camcorders are the short list. In the same price range, take a look at the Sony HDR-CX500 series. Also AVCHD onto flash memory, so in the HF series ballpark..
If it was my $, I would do the HV40 - but it is not my $... Just so you know, I use a Sony HDR-HC1 and HDR-FX1...