[Akella]

I have been reading around and can't understand is it the big difference between them or not?
 
I using iphone, no amp and listening to rap, hiphop, pop and electronic music and i need good SQ with good deep bass. Which one of them i should pick up? Or i need something else? If it possible to take as cheapest as it possible?

 

[Aeneas]

There's defintely a difference in sound quality - X10 is much better. Maybe not hugely better unamped, probably not worth an extra $150 on sound quality alone either.
 
The size, comfort and fit is remarkable though.
 
S4 (not tried) is great bang for the buck though - from what I've read.
 
X10 in my opinion id overpriced when it comes to sound quality, but the comfort is worth paying for if you have issues with other IEMs/earphones.

 

[Akella]

aameerp, But how about bass is it deep?
 
Now i found out that can get Fiio E5 if it's need for an amp.

 

[Aeneas]

They both have good bass response and SQ (better on X10 obviously) but you will need a good seal.
 
Remember that the X10 costs around 3 times as much.
 
Maybe you could look into a cheaper Klipsch X5 (very similar shape/fit - comfortable etc.).
 
See these pages:
http://forums.klipsch.com/forums/t/130323.aspx
http://forums.klipsch.com/forums/t/121769.aspx
http://www.klipsch.com/na-en/products/image-s4-overview/
http://reviews.cnet.com/headphones/klipsch-image-s4-earphones/4505-7877_7-33577358.html
 
 
Personally, I would decide on a budget FIRST and then spend all of it. Otherwise, you might want to upgrade in a few weeks/months and will lose money.
 
WIth the X10/X5 the cable/general frailty is touted as an issue, so a warranty would be useful but at the same time, a new pair may cost double of a used air, so make up your own mind.

 

[OPTiK]

I think I got some crazy distortion with my x10+e5 combo, but I'd have to try it again since it was awhile ago.