Well let's start:
- Good video quality for uploads. Well, the upload settings will be handeled in your editor, so I think you can narrow this to good video quality in general.
- Good slo-motion. Here you are going to want a camera that can do 60fps progressively. This is probably your biggest hurdle. Some cams do 720 x 60p but almost no consumer cams do 1080 x 60p (except Sanyo FH1 and hd2000). So the questionsis, do you need 1080p?
If so the Sanyos are your only option if slo-mo is very important to you. If you're fine with 720p then I believe there may be a couple out there but I believe most are prosumer cams the cheapest being the HMC40 which is about $2g.
Your other option is to to get a 60i cam and do some post work for slo-mo. Not nearly as good as native 60p but it'll do the job if you have the right software (twixtor and others).
- I would go solid state for a couple reasons. No need to capture, better with vibration. Most solid state cameras capture in an MPEG4 format (AVCHD, H264,etc) and editors don't play nice with these formats so you usually need to transfer to an intermediate editing codec. All in all, there a pros and cons to both, but I feel the solid state is worth it.
-Focus ring. The hfs10 or hfs100 both have focus rings and are great cams. The
Panasonic's HDC-HS300 and Sony's HDR-XR520V have focus rings that are also able to control other functions which is nice.
- Not aware of any handle cams around that range.