Interestingly I got a PM from a Head-fier mentioning that the ZO has bridged the gap between the Miracle and the Merlin bass wise. I've got my name down for the ZO v2, so can't comment yet, waiting for release info. But this could be a very good option for most.
Thanks for the info Aaron, but IMO a Balanced Armature bass driver still has a different sound on the low frequency even when amped or EQ'd to +DB compared to a Dynamic Bass Driver. This can be heard when you have natural recorded instruments like the Cello or even a Bass Guitar. If you are a fan of dynamic headphones, you will hear a lot of differences with the BAs and you will group the DD headphones as very natural sounding. Well from what I hear with 2 DD iems, which is the FX700 and the EX1000, their superb timbre cannot be found on most BA iems. Just my 2 cents.