actually, what I've found out is that the Shure olives are alright, sound better than stock but makes the soundstage too wide and unreal. It seems like there is sound coming from the left, right and the middle but nothing in between, this I found made it difficult to locate things.
For the last few months I've moved to the E2C Orange Foams. Soundstage is not quite as wide but there is much better distinction in location, it also cleans up the sound quite abit. They don't last as long and are more temperature sensitive but they make the UE SF5Pros sound much better than with any other tips.
The other thing to mention is that they are much easier to put on and are cheaper than the Olives
Shure Orange Foams
i've been using shure orange foams for years now either my UEs, that's include super fi pro and eb, triple fi as well. very clear sounding tips. comply is very comfortable but it does make it sound very muddy.