off-idle stumble on normal acceleration

[Jcrow]

Any ideas. It only does it sometimes. its ususually only when accelerating at a light to medium rate. It happens just as you press the gas, it will almost stall, then it takes off.
Plugs and wires are pretty new, maybe intake gaskets? I have an Autozone IAC (not sure of quality) but other than that the car runs great.