Terry use the capo by all means but don't use it as an excuse not to learn the chords in other keys. There are a couple of reasons for this, firstly if you are ever playing in a session and the lead calls a key change, in the time for you to work out where to put the capo and to change position the tune and key would probably have changed again. Secondly it is good exercise and dicipline for you to learn all the chords you are liable to need as it makes your fingers supple and helps you to work out what chords are needed for a particular tune or song and wether an alternative chord would suit the tune better.
cheers Bill