Consider yourself beaten, you heretic
Seriously though, Sideshow is a huge chunk of change, though you might want to check prices at Robby for those as well
A box would be a good idea, though I'll say this, ordering a set, so long as you have the patience to do so, isn't a bad idea, off ebay later down the line. This series is bound to have some surprises but you never know. They might not be that hot this time around, or they may be even hotter.
