I'm thinking about switching to a tablet cause Im constantly underaiming with mouse. People said that the CTH-480 is the best, but its an old tablet and almost impossible to find brand new. As an alternative, they say i should pick the Gaomon S620 but its not as good as the 480. Currently found 3 480 with a fair price and in decent conditions. should i pick a used 480 or just buy a new s620 instead?