Sourcing for a GPS

Must have:

• 4.3 to 4.7 inches touch screen (my eye vision isn't good)
• Voice instruction (I hope I have three hands when driving)
• Spoken Street Names (sorry but learning English is a lifelong fun)
• Bluetooth Hands Free (my mobile should be in love with my new GPS)
• Downloadable and updatable China maps (TomTom you are fired)

Nice to have:

• Live traffic update build-in -- only if it doesn't slow down Routing process
• Speed & Red Light Camera alert -- I have incurred more than $3000 in speeding penalties so far.

At moment, it seems to me choosing a Chinese local brand will mostly suit the course. Tom Tom is fired as it doesn't provide downloadable China maps. Garmin does have those maps but wow.. do those maps are voiced out in English? That will sound funny because when you are in China you do want to listen to Chinese.