Why so often do they make the hybrid/fitness bikes (eg. Allegro) with triple cranks? With the lower end groupsets, isn't shifting quality already a bit compromised, but making the FD have to cope with a triple.. why?
The city/urban type bikes otoh, (eg. Cypress or Crosstown) have single cranks.
Why so often are doubles are excluded from the budget bike options?
For the OP, I guess I suggest you figure out what type of terrain you're riding and therefore the gearing you'll need.