[reddragon]

 
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I consider the GR07 an upgrade from the HF5, yes. It extends better on both ends, has better soundstage and imaging, and being a dynamic it has more natural-sounding decay.

 
 
that sounds good.
 
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GR07 will have that sub bass you seek. It is present and can be pretty strong when called for but usually polite and non-intrusive.
 
 

 
that sounds good.
 
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Hmm, some people find the GR-07 harsh too, so I don't know if they will suit you... but the soundstage and imaging are certainly better than the HF5. 

 
 
 
then why do you think hf5 is better than gr07?
 
 

 

[Jeremypsp]

 
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then why do you think hf5 is better than gr07?
 
 

 
The reason is... none other than bass. I find it hard to take IEMs even without that much bass (just me, I guess). Therefore, I tend to let loose and have lower expectations for soundstage, imaging, detail and clarity.