i've seen a few of the Sternguard pics from the leaks and they look promising, going to be interested to see how many and what kind of combi-weapons are on the sprues.
The fact they are plastic is a MAJOR selling point IMO, i bought one box of "Fine"cast Sternguard and as per usual with finecast it was all warped and crappy.
If i hadn't already made my Sternguard out of Forgeworld guys i would be stocking up on the new plastic models.