I know I want it to have these specifics

- Small size, weight and comfy grip (if you plan to film from hand);
- Handy storage medium (most robust is internal flash memory and/or memory card);
- Optical stabilizer (electronic ones are worse, but you might not need it at all for steady shots);
- Optical zoom (digital zoom is just a cheap advert trick and decreases resolution while zooming);
- Stereo microphone (you might also appreciate windshield, and least exposed location on camera casing);
- Long battery life;
- HD in progressive format (especially for filming fast moving scenes);
- Easy connectivity with PC;
- Extra goodies (photo function, night vision, high speed filming, touch screen, built-in light/flash, jack for external mic, cables, remote control, carry case, software, etc.);

I'm going to be using it for vlogging so I want a good one for that... and it needs to be cheep