Hi James,
I am the applications engineer supporting the AD5541A. I can't recommend a suitable amplifier, (though someone on this forum should be able to) but I can give some pointers.
The AD5541A is an R-2R DAC architecture, which means that when you change codes the amount of current taken in through the VREF pin varies. The 10uF capacitor is there as a charge reservoir so that the dynamic Vref currents don't disturb the reference voltage. If your low noise amplifier has sufficient drive capability you can probably reduce the capacitance value needed.