I have another question for all of you experts. I've been thinking about this circuit design and I think it might not actually work for what I need. At the coil, I need about a watt of power, but will I actually get no power carrying forward in this circuit? Sure, I'll get a voltage carrying forward from the op amps, but will I get no significant current because of how the op amps work?
In combination with the available supply voltage, the power output is determined by the sum of the output impedance of the opamps, typically a few ohms, plus whatever series resistance is added at their outputs. The output current capability of the opamps is closely related to their output impedance; often the data sheet will show both.
The circuit as published uses opamps rated for output currents up to 70 mA, so that's about a quarter-watt into 50 ohms. Power in the 1-watt range is achievable, but you'll need to go with beefier opamps. The
THS3491 would be a great choice since it can run from +/- 12V rails. At lower voltages you'd need to scale down the series termination resistors at the outputs, and you're better off not doing that for various reasons (notably the ability to tolerate a reasonable amount of load capacitance and compatibility with 50-ohm cabling and components).