PostgreSQL has the excellent pgAdmin-tool for controlling the database but lacks GUI data-modeling utility?
I discovered this list: http://www.databaseanswers.org/modelling_tools.htm try not to have enough time to judge them.
Which would you recommend?
The MySQL work bench is really a fine modeling tool that's free, but you will need to customize the SQL it creates for PostgreSQL.
If you need to pay, ERWin is really a standard.
You could also wish to take a look at Energy*Architect.
There's a free software database design tool for PostgreSQL: http://www.toad-data-modeler.com/