etymotic hf 5 vs hf3 vs westone 1

I have a pair of HF5s and my much cheaper FX67s massively outscore them for bass. It's not that they produce more bass (I use a Cowon J3, so I have all the amp volume and EQ in the world) its just that the bass on the 67s is more musical, if that makes sense. In fact, the 67s are - to my ear, which is all I care about - almost as good as the HF5s in every department except those where they are better. Given that they're stupidly cheap on ebay and absolutely excel at base, I'd buy a pair and then see if I still felt the need for anything more expensive. (But then I'm saying that to everyone today - I love my 67s.) Search for Katun's review if you're interested.

Anyway, the HF5 has a great rep in general, but bass (and awful microphonics) are usually considered its weak points I believe.

Other suggestion: tell people more about the player you are using - the qualities of your amp and whether you have good EQ will make a difference to the IEMs you should use. 

I have W4's and have tried W1's (I got them for my gf) and they are extremely capable. I do not listen to dubstep a lot, maybe if a friend links me briefly or something, but it can definitely handle Mumford and Sons, MGMT, Passion Pit, and Death Cab with ease.