Tried a Diet Coke with Splenda? It is much closer to the taste of Classic Coke than Diet Coke. It has that very distinctive after taste of Classic coke that is missing from Diet Coke.
Yes, I did. I hated it. It was wayyy too sweet.
I've ordered a Soda Club home carbonator with which I can make my own carbonated water. They have syrups which you can make regular and diet colas and other soft drinks, or you can make seltzer or club soda.
You can control the amount of carbonation and the amount of sweetness. It's an Israeli company which has had much success marketing this gadget in Europe, and hopefully it will gain popularity over here.