Having a pair of dt250, and listening to classical music, i cna give you a quick rundown of the pros and cons here, as i use the Dts to listen to music before I sleep.
1: if youre looking to lie on the bed and use the 250s, they might slip off your head. another problem is the power it needs. for these headphones to perform at their best, they would work best with an amp. otherwise all you might get is some very soft music, and you'll feel something is lacking.
2: where the Dts perform is in classical music. with their general treble bias, if youre looking for something that works by bringing a performace hall in, the Dts might be a wonderful choice. but the best that these work in, is for piano and harp music. dont go looking for deep heavy bass rubles in these though. you won't get them
having used the 250s for over 3 years now, and being a classical muic fan as well, I can safetly tell you that the 250s will be a good investment, if youre looking for a pair of headphoens that perform well with a range of music. they are also extremly durable, and most of the parts are interchangable, not to mention its fairly easy to tweak. so if you do want, do take a good look at the 250s, but keep in mind you need a amp for it to perform at its best.