I have always found that buying something for a hobbyist is fraught with danger unless you know
exactly what they want. Nothing is a bigger bomb than giving a hobbyist (although they probably would smile and say thank you) something that is only sorta, kinda like what they wanted.
On the other hand, whatever you are asking for, make sure it is clearly circled (in red) in the B&H catalog or you have emailed the precise item link to the prospective giver (spouse). Of course, this has its own danger in that the giver (spouse) learns just how much you pay for this stuff.
May your stocking be filled with goodies and your Christmas be grand.