It's funny how little the AD1000 gets attention here. But price-wise, and why not performance-wise also, the W1000 is closer to AD2000. I've listened to both but haven't got the W1000 to myself, so can't throw anything wise at you. The AD2000s are more picky about amplification and source components. Both are fast and display transients naturally, but the W1000s did seem rather bright out of most systems, at least when compared to AD2000s.. I'd enjoy both though
Can't do W1000 with AD1000, but with W5000 and AD1000PRM the difference is quite a bit.
The W5000 sounds like cr*p out of an iPod but AD1000PRM is passable.
Both improve vastly with amping.
Surprise that the open AD1000PRM is more upfront in you face kinda sound than the closed W5000.
AD1000PRM have this deadly sweet mid-range which is great for vocal, best with female vocal.
Detail wise, the AD1000PRM throws everything at you at once, W5000 have the same, maybe more detail but its much more subtle.
AD1000PRM have a more sparkly treble, and hard hitting bass impact (but little bass quantity)
W5000 is a overall smoother listen.