Yea I have been reading about the ones you suggested and it seems the Sure's have more bass (as they have enhanced bass i think?) I can also get the S2's as I hear they have a better build quality then the S1's and are about 20$ more.   

Thoughts on the Re 400? As they seem similar to the S1's

So I want to get a pair of IEMs that I can use when running outside, or at work, as such I don't want to go to expensive (140+) as these IEMS will be used everyday for around 6-10hs a day 5 days a week. Isolation isn't a big deal as no one is near were I work and as I am jogging/running I will...

So I have been looking for a good pair of cans to upgrade to from my CoPs, and I have read a few reviews on Mad Dogs but arn't they just a modded pair of a 100$ pair cans? How hard would it be to buy the 100$ cans and mod it? I just find it weird that there is 200$ difference between the...