At the risk of stating the obvious – your dream bike is your dream not anyone else’s. I would look at the bikes you already have and list the things you like and dislike about them. Then order your priorities. For my last bike e.g. I knew I wanted more travel, enduro-and XC capable, light enough for hike a bike, and not 29er.
If the conclusion is that your love your current bikes, why not get the best, most saleable bike you can, then sell it and spend the money on something else?