I bought a 10 inch tablet a while and after about a year I ended up going back to a laptop. This was mainly because I got fed up with Android apps and various compatibility issues. Having said that, tablets are a very good concept and I am sure they have improved.
I do still use my tablet, but mainly on holiday – they are excellent for loading movies or concert footage on for long-haul flights. They are also great for surfing, picking up e-mails etc. However, you need to treat them differently to a laptop to get the full advantages i.e. leave it on all the time so accessing stuff is easy and quick. Plus the battery life is, on the whole, far better than a laptop.
As for models? The Google Nexus 7 is supposed to be the best out there.
Apologies for the random stream of consciousness, but the VaTs may have taken over.