I listen to plenty of Classical music and I would NEVER recommend the SE215 for this particular genre - poor recessed treble performance and rather boomy & uncontrolled bass which lacks texture and refinement, mids are quite good, though.
I would highly recommend the EX600, which in the USA can be had for $125 - $140, and it not only performs much better than the SE215, IMO - particularly at both ends of the spectrum ,- but better than quite a few $300 - $400 IEMs. The EX600s, specially with orchestral music, are simply stunning, with the best soundstage & realistic/natural sound I've heard (along with the much more expensive EX1000s). The EX600's replaceable cables are also better than the SE215's where there have been several reports of issues due to the not so great swivel mechanism used in some of the new Shure offerings.
However, if isolation is important, then the SE215s are a better choice, though I'd still look elsewhere as the SE215's sound signature/SQ, IMO, is most definitely not suited for Classical music, and not that great with other genres, either, though not all that bad for $100.
Yeah I would like to get the EX600, but I just can't that kind of money sadly. Also, what are the IE2 good for? I am probably going to get Sony Mdr-EX510.