Beeble

Well, thank you for the advice, but I honestly kind of forgot about this thread. I had made another thread on Head-Fi, and asked for the best IEMs under $200, I ended up buying the Shure SE215s and I am very pleased.

For them to be offering fully custom IEMs for £100, they're going to be absolutely terrible. The IEMs you see performers using on stage go for around £1000, just to put things into perspective. Another thing to note is that at 14, your ears are still growing, they don't stop until you're about 18-20, so buying custom IEMs now would mean they would probably stop fitting fairly soon, and the fact that it's hard acrylic would make that much worse (and acrylic is also very uncomfortable).
 
I've never seen those Yamahas before, but to be honest, they don't look great. 
 
If I were you, I'd check out the Shure se215 or 315s if you can stretch to it. These are the industry standard in the audio world where an artist doesn't have their own custom IEMs. They're very comfortable, sound great, and are very tough too. 
 
Hope this helps!

For them to be offering fully custom IEMs for £100, they're going to be absolutely terrible. The IEMs you see performers using on stage go for around £1000, just to put things into perspective. Another thing to note is that at 14, your ears are still growing, they don't stop until you're about 18-20, so buying custom IEMs now would mean they would probably stop fitting fairly soon, and the fact that it's hard acrylic would make that much worse (and acrylic is also very uncomfortable).
 
I've never seen those Yamahas before, but to be honest, they don't look great. 
 
If I were you, I'd check out the Shure se215 or 315s if you can stretch to it. These are the industry standard in the audio world where an artist doesn't have their own custom IEMs. They're very comfortable, sound great, and are very tough too. 
 
Hope this helps!

For a normal sized laptop you wont get anything more reliable than a Thinkpad. :)