tbh I suspect you can get quite a few at that range that will have a more lively sound due to the closed back nature of IEMs more bass extension and more treble. I had a pair of triple fi10 from back in the day they definitely had a more lively sound than the hd650 maybe a slight bit bright but at the time I didn't run them on anything special. Details is a hard one to judge as it depends on the amp you are using with the HD650 they scale very well. Have a look at the Etymotic ER3-XR they are getting great reviews on the internet. Can't say whether you will prefer them as that's for you to decide but I would say if you are going to try some they should be on the list.