[morzh]

The resistance matters very little and the gauge of your wire will mostly determine the robustness of the soldering spots and the wire itself rather than the Q. The reason being, at this frequencies the resistance of the wire is determined by the skin effect, that is the thickness of the layer where the current actually flows. Unlike in case of DC current, AC current creates a magnetic field that "pushes out" the current from the center of the wire to its outer layers. This way the Ohmic resistance is very different from what you would measure with your DMM.
DO not confuse that with the inductive (reactance) impedance: this is still the active resistance, but dependent on the frequency of the current.

Therefore, if you want to use a bit thicker or a bit thinner wire, it is OK and the criteria are: 1) ability to fit the wire in the frame (too thick), 2) flexibility (too thick), 3) breakability during handling (too thin).