android internet tv

Hi, I'm thinking about buying a google android internet tv, the newer 2.3 version. I'm finding the different models available quite confusing. Should I go for the rockchip 2918 model. There is also a model called itv01 which does seem to cost more, what is this and is it worth it. Are there also different brands for the same machine, such as Samsung or Sony. Finding this market confusing. I want to make sure I get the latest and best model. Thank you.