my suggestion is to check out Moustache bars -- actually, I so far prefer flipped North Road bars for the same type of riding position, which are cheaper and more readily available. (see the recent thread here on moustache bars).

Combined with a very short-reach stem, you get a range of positions from upright to semi-upright, but not as low as drops.

If you insist on going indexed, you can mount up STIs ("aero" integrated brake levers and shifters) on just about any kind of bar. There are a LOT of alternative bar shapes out there now (see www.velo-orange.com and http://www.somafab.com/).

STIs are much, much more comfortable (I think) than old-school drop-bar levers for riding on the hoods.

You might do just fine with a shorter reach stem (a nitto technomic or a dirtdrop if you want to get the bars higher), your same bars, and a set of STIs. Changes like these (or even any one of them) can have a pretty radical effect on the comfort and enjoyability of the ride.

Welcome to C&V, where we'll chat--not chew (usually)--your ear off.

Eric