Triple.fi 10's are less than half the price of SE535's, Westone 3's, and SM3's. They're also a decent bit less than the IE8's. For the price I would say that they are the best value. However, comparing only their sound, I would say that TF10's are about on par with IE8's and maybe a little tiny bit under the SE535's and Westone 3's, provided that you can get a good seal which is difficult for some people because of the awkward shape. Each one of those 4 headphones has a unique sound signature though, so depending on your preference you could easily find any of the 4 to be superior to the others.
In my opinion the SM3's are better than all 4 of those headphones, but that's just what I think.