I am ok with one cup of regular coffee, but if I have more I feel spacy and shaky . I know you work ,so you like to have more. I know when I worked in an office I drank a lot of coffee, then I switched to tea. Tea for some reason doesnt have the same effect on me that coffee does.
I have been putting my cookie dough davinci in my coffee and I like it. Reminds me of caramel I am nowhere near my goal so I try not to use splenda when I dont have to.

I think I have heard some bad things about decaffeinated coffee. Just do a search on the internet.