I would say to finish the basement. It adds usable sq/ft to the home. In the million dollar range, in Zionsville, you will have some resale competition and will need all the finished sq/ft you can get. Decks are nice butI 'm afraid if you went that route, you would always end up with the resale objection of not having the basement finished. In the 1 mil range in Zionsville, I think a finished basement would be expected. Lots of nice model homes in Stonegate with 5000-8000 sq/ft plus finished basements/theators/wet bars, etc. in this price range that would compete against you.