I'm wanting to do a conversion using some Chaos Warriors on 20mm bases.  However, the models are just beasts and don't fit all to well.  I've tried shoulder-to-shoulder and it may work if I trim down the capes a little bit.  I could also go staggered, which may require trimming too. 
 
 So my question is - do they look too crowded?  I could use 40mm bases interspersed but that makes playability a little hard (from experience with regimental bases). 
 
 
Shoulder-to-Shoulder
 
 
 Staggered
 
 
 Staggered, two ranks