Stepdance, Arrow or uHA-120

[dadab12]

I'm sure many of you peole heard that comparison somewhere, but I'm about to purchase one of these amp to pair with the Ultrasone pro 900 for portability use, In terms of size difference as it will mostly be used for portability what amp is the most compact?
 
In terms of sound difference what would complement the pro 900 the best?
The extra features that the headstage arrow has really necessary as opposed to both amps who lean more on simplicity and just plug and play..
I've read that the stepdance has low battery life, is that critical? 
 
Hmm, It's so tough to pick one, but it's a must and I'm really looking for the best amp to contemplate the pro 900, I have yet to receive the pro 900 though but it should ship on sunday so I don't really know how they sound  but from people's impressions i'm looking for a wider soundstage, added clarity. and maybe a tighter bass.
 
Any suggestions guys?
 
I'm from europe so I'm really looking for manufactures from europe mainly because of shipping costs.
 
Thank you, I'm opened to all sorts of suggestions. Greatly appreciated
 

 

[Szadzik]

There are 2 threads at least with this question and you should have a look at them. Again, I am going to recommend Meir Audio Stepdance - meier-audio.de