It depends on what exactly you listen to and what you want from the phones and what you want to spend- For running, I find that the buds with a cylinder that connects directly to the cable is more likely to stay put than the kind with plastic or metal 90 degree legs even if they are short since this seems to put the center of gravity more towards the outside, but the ones without that leg means that sometimes the only way to pull them out of the ear is by the cord, hence greater chance of damage to them. How much fidelity do you want? Or are you most concerned with them staying put? and must they be actual bud-type or will any kind suit if it isn't likely to fall off?
I found that a no-name Q:electronics cheapo fit very comfortably and eliminated much noise to the point where I couldn't actually hear people addressing me unless I turned them down (so I would need the kind with the volume control for those or constantly be yanking them out to talk to someone) I find that the cylindrical barrels with the adjustable/varied silicon tips were most comfy - much more than the round disc-y like ones that sort of just sit in the crevice before the canal. Sony seems to have always had decent sound vs others, but without trying several kinds on the same source directly after each other its hard for me to get a good idea of what sounds better. I'm kind of stumped as to what to get myself now, since I don't want to spend much on something that is likely to get abused a bit just by the nature of it being designed for portability. Those ones in the OP look like the cord is less fragile looking than most, but I think I'd rather get two pair of cheaper ones and have a spare just in case for the price.
Anybody try the Skullcandy Titans? They appear popular, but that doesn't mean much other than lots of people might not have any clue what a good earphone is like... the CX500's I have seen with good mention too... I'd like to find a set that is proper-in-ear without the 90 degree leg with a volume control under 30 bucks... any recommends for those specs? I'm really thinking about grabbing the 2 for 34 Q:electronics off Amazon since I know I didn't hate those unless someone can convince me of a comparably priced better alternative.