Before buying a Canon camcorder I strongly recommend you have a read of
This thread as there are a few 'known' problems with Canon camcorders!
1. Most of the well known makers of DV camcorders include some form of image stabalisation. Just make sure it is listed in the specs. Optical will give better results than digital stabalisation.
2. AV-in is the feature that you need to be able to connect any analogue device to the camcorder to then capture the video to a PC. Most camcorders have a specific connector for the AV connections, but the converter lead is normally supplied with the cam.
3. The life of the supplied battery is likely to be very poor and a spare higher powered battery is really needed, especially if going on holiday. On my cam the supplied battery is only ever used as a spare due to its poor life.
4. Don't worry, these are normally just different terms used by different makes of camcorder.
5. IMO Sony & Panasonic make the best camcorders
Mark.