I would rank those 3 in terms of bass quantity:
IE8 > MTPC > SM3
You could also consider the Westone 3.
Consider the Miles Davis Tributes...great bass
Why's that? Looks?
The IE8 is the bassiest IEM I own.
Yeah, it would be between the IE8 or MD and you don't want a MD. That was simple.
If you crave for bass I recommend the DDM, it makes me sick when listening to House sometimes because of its bass rumble. Never heard the IE8 though.
For mile davis, it is not 'clear' enough.
I don't want to have bass quantity only but also quality
http://www.head-fi.org/forum/thread/516132/review-radius-hp-twf11r-double-the-fun maybe you'll find ClieOS's review helpful. The DDM has both quality and quantity.
Sounds like a tip and fit issue. So I take it you've heard them then?
for audiophile basshead quality get westone 4 and be done with it
I haven't try W4 before.
To me, bass of MTPC is more attractive to me than ie8 even i turn it to the fourth level...
But I haven't try SM3 before ....
But what about quality?
I recommend Turbine Pro Copper as well.