GH-595, Oh yeah!!!
Size looks very good.
About colours. I'm not sure yet, do I like or not. Maybe I would like to see GH-595 with carbon look and metallic buttons.
Battery life is too short for triathlon usage. At least it should have possibility to charge it very easily (during race) on the fly.
Also sirf star III was small disappointment, I was waiting sirf star IV
How about protocol, does it support ANT+ ?