Asus Transformer Infinity is a 10.1" tablet, should be the best, highest resolution, with an LTE (4G?) version available, But sadly it's still not launched yet (I'm waiting for it though).

The Google Nexus is a 7" tablet made by Asus for Google, No 3G, but has the latest android ver 4.1.1 (Jelly Bean).

Asus Transformer Prime is a nice Quad-cored 10.1" tablet with the highest brightness (should be easier to view outside) there is, but no 3G model, and there were some complains regarding Wifi & GPS reception.

If I gotta buy now, I'd go with the Infinity, or Nexus Tab for the 7".