It hasn't been discussed a million times. There are far more useless questions out there- so much so that this is a good question.
If you're looking for an iem for running and exercising then you don't need to be too picky on sound quality I would think. Ergonomics and fit considerations should come first I think.
With fit there's just no way of me knowing what would be suitable and I would say for many out there, for running and movement both the klipsch and the shures aren't that great. They are a bit fat, hard to keep in place sometimes and not that ruley (esp the shure that is). I would go for something that has a large soundstage, a balanced signature (as you wanted) and most importantly has a good build quality, low cable microphonics, nice fit and range of eartips, good cable and body.
There are too many to choose from. If you were looking at the klipsch s4, have a look at the philips she3590 (which costs far less yet sounds a lot better). There are others with rounded/slimline IEM bodies that stay in place even with a shallow fit (some, like the ety's require a very deep fit which isn't ideal in my book to have when exercising. Brainwavz pro alpha is another that'll be very good, at a modest price.