A David Bowie Question?

Hi, I'm interesting in purchasing 2 Bowie albums but I really can't decide which. Right now I own 3 of his albums (The Rise and Fall of Ziggy Stardust and the Spiders From Mars, Lodger and Hunky Dory). I really like Ziggy and Hunky Dory but Lodger is kind of Hit and Miss with me. Out of the tracks I've heard from those albums my top 5 songs are 1. Quicksand, 2. Soul Love, 3. African Night Flight 4. Life on Mars and 5. Changes. If you wouldn't mind I would appreciate if you could point me in the appropriate direction. Thank You very Much for your help have a nice day