Under Nec 2011, I need neutral to every switch box; can I just use 2 14/2's instead of paying extra for 14-2-2?
The Authority Having Jurisdiction (AHJ) might call you on 300.3(B), since not all the conductors are in the same cable.

National Electrical Code 2014
Chapter 3 Wiring Methods and Materials
Article 300 Wiring Methods
300.3 Conductors.
(B) Conductors of the Same Circuit. All conductors of
the same circuit and, where used, the grounded conductor
and all equipment grounding conductors and bonding conductors
shall be contained within the same raceway, auxiliary
gutter, cable tray, cablebus assembly, trench, cable, or
cord, unless otherwise permitted in accordance with
300.3(B)(1) through (B)(4).

You might want to contact the local electrical inspector, or redesign the circuit to avoid the situation altogether.