Miranda....
I'm not certain if you are asking about whether a given radio is needed for that type of airplane? Maybe hubby desires the airplane, maybe a motor, etc. and doesn't need the new radio because he already has a few that he loves?
If a radio is desired, AnnMarie asks some very good questions...I urge you to answer those questions prior to making a choice.
If you get certain answers and need more help, come back here and ask more.
Nice of you to be looking for this kind of present...
--Sean