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TLV320AIC3111: Replacement of TLV320AIC3111 Audio CODEC without having advance functions.

Part Number: TLV320AIC3111
Other Parts Discussed in Thread: TLV320AIC3007, TLV320AIC3100, TLV320AIC3110
We have been using the TLV320AIC3111 audio codec for our application for a medical device. We have used more than 2K quantities and currently in production. 
In the new development, we are planning to do DSP filtering in the microcontroller itself. Help us in selecting the audio CODEC, I2S compatible output with a class D or class AB amplifier of 1.7W or more @ 8 Ohm.
Our requirements are -
  • Low power
  • 1 analog input with MICBIAS support
  • Support for bi directional I2S
  • Class D/ AB amplification required (around 1.7W or more power at 8 ohms)
  • Cost < $2.4
  • Supports sampling rate of 8kHz
Please suggest your top 3 running part no that satisfy the above criteria.
  • TLV320AIC3007 TLV320AIC3100 TLV320AIC3110
    Power Consumption 8mw at 8khz 6.7mw at 8khz 6.7mw at 8khz
    CLASS-D Mono 1W/8ohm, Mono 1.6W/8ohm, Stereo 1.29W/8ohm,
    Mic Bias Yes Yes Yes
    Inputs 3 Diff,1 Single Ended 1 Diff,3 Single Ended 1 Diff,3 Single Ended
    Sampling Rate 8Khz-96khz 8Khz-96khz 8Khz-96khz

    The Table above lists some possibilities. TLV320AIC3100 can deliver 1.6W into 8 ohm .

    Best Regards