I've recently obtained my HSMP entry clearance and will be moving back to the UK this coming August 2008, which I'm excited about

My partner is American, and I wish for him to join me in London. What would be the best way for us to do this.
Will the fiancee visa be our best option and what documents does this require? alternatively,we are getting married next June 2009 in my home town. is the spouse visa a better visa to do this through?
any help is much appreciated, thank you