Must agree the Nexus 7 is a superb tablet if you need to carry one around with you, I did have one on loan for a short time.
But I must say given the choice I would personally go with the larger screen, as my tablet never leaves home.... it also saves me from being busy and enlarging the text to read it.
I should really wear glasses..!
One other point when buying a tablet ... avoid buying a cheap Chinese imports in case of a warranty claim, and stick with the bigger names sold from the UK. There's more chance of some customer service from a UK seller.