[DSII] Infantry basing question

What size bases do people use for DSII infantry? I was
thinking of using 10mm square or 3/8" square steel bases.
I've seen bases about this size (Epic 40K), but the
infantry bases in the rulebook photos look like about
.25"x.5".
 
Unit integrity distance for infantry is defined as 2"
between elements. Is this center to center:
 
  +-----+	 +-----+	+-----+
  |	|	 |     |	|     |
  |	|	 |     |	|     |
  +-----+	 +-----+	+-----+
     |		    |		   |
     |<---- 2" ---->|<---- 2" ---->|
 
+---------+    +---------+    +---------+
|	  |    |	 |    | 	|
|	  |    |	 |    | 	|
|	  |    |	 |    | 	|
|	  |    |	 |    | 	|
+---------+    +---------+    +---------+
     |		    |		   |
     |<---- 2" ---->|<---- 2" ---->|
 
or nearest-edge to nearest-edge:
 
    +-----+		 +-----+	      +-----+
    |	  |		 |     |	      |     |
    |	  |		 |     |	      |     |
    +-----+		 +-----+	      +-----+
	  |		 |     |	      |
	  |<---- 2" ---->|     |<---- 2" ---->|
 
+---------+		 +---------+		  +---------+
|	  |		 |	   |		  |	    |
|	  |		 |	   |		  |	    |
|	  |		 |	   |		  |	    |
|	  |		 |	   |		  |	    |
+---------+		 +---------+		  +---------+
	  |		 |	   |		  |
	  |<---- 2" ---->|	   |<---- 2" ---->|
?
 
If the latter, is there a recommended base size, to minimize
imbalances? (I.e., infantry on 10mm square bases has to stay
closer, on average, than infantry on 15mm square bases, and
is therefore more susceptable to any area effects.)
 
- Sam
________________________________________
Samuel Reynolds
Full Thrust at Spinward Stars: http://www.spinwardstars.com/ft/
Reynolds Virtual Workshop: http://www.primenet.com/~reynol
reynol@primenet.com
samuel_reynolds@csgsystems.com