Having said that, I haven't heard of that earphone, but px200 is not recommended. If you like classics, you should choose sound stage wide headphones. Akg's big headphones at this price are also good. The landlord can go and have a look. It is best for parents and children to listen together, because the feeling of sound is a very subjective thing, so you should choose the one that suits you best. Don't trust others.
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Within 400, try k66. In fact, k4 12p is also good. Although portable, it is very suitable for classical and light music. K66 stopped production, and now the price has doubled. This price is not much different.
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AC97, I think this sound card ... can be equipped with dozens of domestic headphones, and the better ones can be equipped with h800, hd20 1 and hd202. Because this sound card has great thrust, but the sound is not delicate enough, it needs to be equipped with high impedance headphones. The voice should not be too low. Those with low impedance will not play well and will be ugly. You'd better borrow an audition.