Ww has lower noise floor compared to metal film. Pulse response in WW better than metal film. Parasitic inductance can be an issue but again an unknown value though a valid point. Everything is still in the planning stage.Hari,
Why wire wound over metal film?
Also, at the level of sensitivity you are working, changing from SMT to leaded type components introduces undesirable lead inductance. Like wise, any low inductance wire-wound resistor is still large added inductance over the SMT type.
Kindly be aware.