Rail-to-rail Op Amps
I don't know all the specs of the op amps being mentioned, but before you spend some money on them, watch out that you match the op amp with your intended need. Not all "rail-to-rail" op amps are the same. Some of them are r-t-r on the output only and not on the input, meaning that you can drive the output to the rails with a lower input signal and a higher gain, but you may not be able to drive the inputs near the rails in a unity-gain situation without causing some input clamping.
Dean