Hard to determine best, but how about:
* YCombinator - Pebble, Upverter, BufferBox
* Bolt http://bolt.io/
* Highway1 http://highway1.io/
* Lemnos Labs http://lemnoslabs.com/
There are probably others.
HAXLR8R would be my pick (http://www.haxlr8r.com/). 111 days in Shenzhen, a San Francisco launch day and reasonable funding (25k-100k) for a small equity stake (6%-9%). The time in Shenzhen would be very valuable if your team doesn't have experience manufacturing in China.