So I'm looking at picking up a pair of Shure SE's, but I don't know if it's worth the extra money for the 315's over the 215's. I prefer as much neutrality & instrumental separation as possible, but for my first IEMs these seem to be a solid & sturdy over-the-ear option and I want to know if the extra $100 or so for better model is justifiable in this instance.
ODogg415@ODogg415 is correct, i have used both, i got friends who own insane numbers of iem's and cans, and having tried most of the low threw mid high range(and one top end set) shure....are rarely a great value, and when it comes to the 215 vs 315, your wasting money if you pay more for them...
oh the other hand, depending on your preferred sig, you can find much better bang for the buck, that cost less and have equal or better SQ..
i own a BUNCH of iem's, the best values have been brands like brainwavz, sound magic(the pl50 is great for audio books and spoken word stuff, but with a tweak to the EQ to flatten their mid centric sig, they are hard to beat for the money, and, you will never find a set of iem's that are more comfortable then the pl50.....if soundmagic would put out a set in the same shape/size(ears) but with a dba...it would be amazing...anyway, everybody whos tried the pl50 with an assortment of tips agrees...i find them best with ety or sony hybrid style tips...) vsonic(who have made some of the brainwavz line), and a few other names well known on sites like anythingbutipod and headfi... )
CrystalUryuuthe ETY hf5's(or if you want headset hf2/3 depending on phone brand, same unit as hf5 but with headset for apple or non-apple) are the best if you are talking quality+isolation shure dont come close in my exp, with foamies or triflanges i have tested etys at 30-40db isolation using a cheap tester on a job site.
for the pl50 im currently listening using tips like these
http://www.ebay.com/itm/152498116492
those give a deeper fit then any stock tip and are quite comfortable but arent as good for isolation, for that you would want to get the ety triflanges.
the hf5 i cant say anything bad about, i had 1 set fail, they replaced them without any problems and even tossed in a cople extra sets of small triflanges for me when i asked!!!
ety has a great warranty and, on top of it, you can trade in our of warranty broken iem's of theirs for a NICE discount on their products....i one day will trade the hf5's in, when they die(well one of the 2 sets i have) and get myself a set of er4pt's.
isolation alone, the hf5 and other ety sets are the gold standard in my exp(and from all i have read)
http://theheadphonelist.com/headphone_review/etymotic-research-hf5-hf2-hf3/
thats what i would recommend, if you want cheaper, even the kids are decent, but they have a very high impedance (so you cant hurt your ears...as a kid...)
hope this helps, jokers reviews are quite good, im glad he moved the reviews he was doing using the headfi forums to his own site with a searchable database ;)