genejockey 

I'd be asking myself "How many gears do I need for the riding I want to do?". The situation you're in reminds me of the old Keith Bontrager quote - "Strong. Light. Cheap. Choose any two." but in your case it's more like "11 speeds. Indexed. DT Shifters. Choose any two."

Essentially, you should be able to do 8 speeds with indexed DT shifters really easily. Last Spring I rebuilt a 1994 Cannondale that I'd added Sachs Ergos and RD, and a Campy Racing T triple to years before. I rebuilt it as a full Shimano RX100 8 speed double, with indexed DT shifters. It works fine for most of the riding I do. Not for hilly days, but I have other bikes for that. It's got a 12-25 cassette and 53/39 crankset, which gives me gears close enough for how I like to ride. I could go for a wider range cassette, but doing so would make the gaps between the gears bigger than I like. So I ride it the way it is. It's fun, especially because the indexing in those early indexed DT shifters is so LOUD, and that big aluminum downtube really resonates when I shift!.