DC的攝錄功能

You need to ask yourself which is more important to you: still photography or videography? You can't afford the best of both worlds given your cause, so you need to make some sacrifices.
Although these days many DCs offer video recording function, quality is not guaranteed, let alone sound quality. Similarly, a modern solid-state video camcorder can give you good video quality but not necessarily still image quality, expecially since most of these camcorders can only record still images at reduced pixel resolution compared to the still DC counterparts.
I'm not a pro in video-related matters, but anyway, here are some suggestions:
a. Sanyo HD2000: primarily a video camcorder based on digital camera infrastructure, but features video camcorder ergonomics, as well as dedicated video recording functions. It apparently does not have any upper limit on the maximum clip length (ie. can record up to the max capacity of the SDHC, per clip), can record audio in stereo, and can accept external mics for improved sound recording. It still features still image recording mode, but the specs are not as promising compared with pure DCs (eg. 12MP interpolated image quality which is not very desirable).
Sample clips and stills can be downloaded here
http://www.sanyo-dsc.com/products/lineup/dmx_hd2000/sample.html
b. Canon Powershot SX1: compact prosumer, telezoom DC which offers video recording function, can record in stereo. However, video operation is quite ackward:
http://www.dpreview.com/reviews/canonsx1is/page10.asp
Also note that overall image quality is not as good:
http://www.dpreview.com/reviews/canonsx1is/page17.asp
c. Casio EX-FC100: compact DC offering some hi-speed HD shooting functions. Just don't expect stellar image and video quality though. Maximum length per clip is limited to 4GB. Can record in monaural only.
Samples here: http://www.exilim.com/intl/ex_fc100/gallery.html
Personally, I'd choose the Sanyo.

sanyo hd2000