Design and Build easy to maintain membership website

I would like an easy to maintain website where I can add content myself. I am looking at 4 - 6 pages. Your advice and input would be welcomed. I already have a logo. This is a membership based website so members will need to sign up. Must also have plugin (e.g. aweber or equivalent) to contact all members, capacity for a forum and an ask the expert section. Again, will give more detailed brief but your input is welcomed.