Here is a shorter alternative (75mm vs 100mm).
Which one is cheaper?

I'm guessing most of the distribution will be done online, so heck, maybe take a cue from Doughty and just bag the things. I'd rather see you keep some extra cash so you can put it toward a future series, unless of course you're going for brick-and-mortar distribution, in which case I vote big box. (Gotta catch the eyeballs on the shelf.)