pair the etymotic er-4s with a good amp and they are in my mind the best combo out there....i have or have had almost all universals and I still use my shure and westones but when I want to do some serious listening I always fall back to my er-4s

There are several foam tips to choose from.
 
There are 3 official tips from Ety. http://www.etymotic.com/ephp/er4-acc.html
The small beige, the medium black and the large yellow

 
2 from Shure (the ones for the E3c will fit) http://www.shure.com/americas/products/accessories/earphones-headphones/sleeves/index.htm
The very popular black "olives" (small, medium and large) and yellow (one size fits all)

 
2 from Futuresonics
Black (small and large) and beige (large only)

 
And the Complys: http://www.complyfoam.com/categories/Brand/Etymotic-Research/ER%252d4-microPro%E2%84%A2-4P/