Always tough to answer for others. what is your budget and what are you looking for do you want a balanced headphones or something like beats that enhance bass for rap and dubstep etc.. Amazon is one of the best places to look because of the reviews etc.
this is the best comparison review with 239 IEM's keep in mind it's from a Audiophile. In other words the reviewer doesn't like the beats type so take that part with a grain of salt. I also agree Monster turbines would be a good choice Amazon has them for $75 so you could buy about 3 pairs compared to Dre's btw same manufacture it's been said the quality is better on these. http://www.amazon.com/Monster-Turbine-High-Performance-In-Ear-Speakers/dp/B001LNO722
I use Shure SE215 and love them. Quality cable, snug fit with good sound isolation. Not had the need to but detachable drivers are a nice touch so either the L, R or cable can be replaced down the line if required
Like Lab says, recommending headphones is a hard thing to do without asking a lot of questions! But the most important question is usually knowing how much you're ready to spend. And $200 is a pretty good ceiling to get quality buds.
Like everyone has been saying, you can't really go wrong with the klipsch s4i.
The only one problem I have the klipsch is the 3.5mm plug they use is a straight plug, like the earphones that comes with the iPhone. I find straight plugs tend to break after a couple months if you put your phone in your front pant pockets. Cause the natural walking motion just bends the hell out of the plug and eventually the wires inside just break. It might not be a problem for some people, but I've had to replace at least 2-3 pairs of wires cause of that. Now I just replace everything with "L" shape plugs if they break.
You might want to take a look at the Sennheiser CX 880i and Shure SE315. Both of which are also excellent and come with L shape plugs.