High quality build aka non plastic, Snapdragon 800, 1080p resolution, latest Android OS Jellybean/Key Lime Pie, 3000MaH or more battery, 5.3-5.7 inch screen and I'm sold.
Yes, with that and 128GB of available internal storage plus
I heard a lot of people complaining about aluminium. Perhaps a "rugged-surface" AlMgSi alloy might fix that. There are also different kevlar and carbon fibre coatings that one could use. Also, why not try using stainless steel? There are many different alloys of stainless steel to choose from.
But I agree that perhaps it is time for Samsung to give their current Galaxy lines a "makeover".