Robotic Vacuum Cleaner

I have been looking around for a good robotic vacuum cleaner. Can't really find it in electric or electronics stores, it seems that it's still not a popular item in households here. But, when I tried to search for them in the Net or from online shops like Qoo10, there are plenty of models to choose from. There are brands such as LG and Samsung to those from China and Hong Kong. The Korean brands are more expensive, some could cost more that $1K. For those not so well known brands, they are in the range of $100 to $400.

I'm still looking for one that can suck up hairs and dust, with battery lasting many hours, auto-homing to charging base and has the capability to run on scheduled times. If you find one, do let me know.