Accuracy of a single to differential ended circuit
For the constraints you have, I would suggest using chopper or autozero opamps. If noise is an issue for you, then go for the LTC2057. If noise is not too much of an issue, then almost any of them would do. But do yourself a favor and stay with Linear and Analog. TI's opamps are not as good when it comes to precision applications. 

For the resistors I suggest using a matched resistor array like the LT5400. The LT5400 gives you better than 0.05% matching over temperature and humidity. If you don't need the high specs, then there are cheaper options.

Please note that chopper and autozero opamps have a noise spike somewhere in the 1-100kHz region. Your ADC has to either reject them (which delta sigma ADCs do) or you need to filter it at the output using a small RC filter.

You also want make use of the LT1054's feedback to stabilize its output voltage. Or even use an negative voltage LDO like the LT1964.