I want to have the Vader with two stormies on each side in a display as well. I have that set-up from the Tomy mini-dioramas; with the commtech Vader/stormies; and up to the 12" stuff. I fear if they ever release Sideshow 1/4 Stormtroopers, because I'll need two 
This is why I ordered 2 RAH Stormies....
Vader and one stormie just wouldn`t quite cut it 

Dude, that's a chunk of change. Also why I left that scale up to Hasbro
Gotta save my money for two Sideshow troopers.
I don`t collect any of the statues, busts or other high end stuff (Well, MR FX sabers I get). So I kind of justify it that way. I used to collect Simpsons, but
they killed that line. If they keep it to two 12" a year, I don`t mind spending the
$$$ on them. If I was buying the Kotos, I probably would pass on these.
Just an FYI, the Stormies are about 98$ pre-order at RoBby. So even if it cost
30 bucks to ship one, still the best deal out there. I ordered 5 in all, two for me,
two for one buddy and 1 for another buddy.
I just hope the Kubs don`t come out at the same time!