I have sent an e mail to klipsch and they answered me saying that the s4i is the same as the s5i. The only difference is the s5i is sweat proof and can be used outdoors. I am not going to use it for running and exercising, I just wanna listen to music with a good quality. I think the s4i is smaller. Will s4i be useful for me???
thanks
You bet. They are good headphones. I have used LOTS over the years and paid LOTS of $$$ over the years. My two personal favorites are the Shure and Klipsh brands for in ear headphones. If you don't need the extra protection, then the s4i's will be a great choice. For the money the Klipsh are hard to beat, in my opinion.
Me personally, for the $29 I'd buy the extra protection. That way you don't have to worry about them as much in case of an accident or some other unforseen event. But that's just me.