Some of its USPs (Unique Selling Points) appear to be - quoting
Canon's website - that besides normal
iinterlaced video, it shoots 24p (progressive) ..to "look like film".. and 30p ..for "sharper looking" video.
Or as Canon put it: "..In addition to 24p Cinema Mode, which allows users to mimic the look of Hollywood-style movies, the VIXIA HF10 Dual Flash Memory and HF100 Flash Memory camcorders offer a new feature called 30p Progressive Mode. Canon's 30p Progressive Mode, once exclusive to pro-level camcorders, delivers clarity for fast action events, such as sports or news, and is the perfect frame rate for clips intended to be posted on the Web.."
But iMovie can't - presently - handle progressive video; it plays it back at double speed if it's 30p, and stumbles over it at 24p ..so you won't be able to use those frame rates if you're editing in iMovie. (..Not that they do anything special ..it's more of a marketing ploy, than anything else, to say that their camera shoots at those rates.)
Note that it uses AVCHD compression, which means that the material has to be
uncompressed during import into iMovie. Your equipment "..I-mac 24" 2.8ghs intel core 2 duo, 4gb sdram, 1tb hard drive.." will be fast enough to do this in real time, but slower Macs wouldn't be able to (..my Intel Mac mini, for instance, takes 4x real time to import AVCHD..!)
The camera's price is very good for a "full 1920x1080" hi-def camcorder ..but those SDHC memory cards are very expensive for the amount of movie they hold ..and video expands enormously when imported from the AVCHD format, too, so it's good that you've got a terabyte of hard disc space to hold it all.
It's a lightweight camera - judging by the weight of other "no-moving-parts" memory chip camcorders, which is good in many ways, but that means, too, that it'll wobble in your hand - which isn't good for telephoto shots with the 12x optical zoom ..or the 200x digital zoom (..which will be next to useless, I'm afraid..)
So, (a) it's cheap for what it offers, (b) but memory cards are expensive, (c) it's nice and lightweight, (d) but that can work against it at full zoom, (e) its progressive frame rates will be unusable with iMovie, though its
interlaced shooting will be OK, (f) its Canon optics should be very good, but (g) its single CMOS sensor may give rather grainy results indoors. Oh, and (h) you may want to buy a screw-on wide-angle adaptor for shooting indoors anyway.
On the whole ..as you have the right Mac for it.. go for it!