ZethHQ: I think choice is awesome when the choices are at a par in terms of cost/benefit. But there's no reason to make a macerator if a pulverizer is 10% better, ya know what I mean?
The only time I've ever built a macerator is in modpacks where there is a macerator-specific recipe that demands it. But if my "choice" is limited to two machines with the same cost, I'll go with the one with the better benefit. If limited to two machines with the same benefit, I'll go with the one with the better cost.
Bioreactor vs still/fermenter is, imo, a good modpack dilemma. I prefer the bioreactor because it requires less infrastructure and maintenance, but ultimately they both output biofuel in different ways and everyone has their own preference