any good 100 ounce or greater metal servos will work. I say metal on the XL because it the larger surfaces can load more than you think, so holding power is what you need to prevent flutter.

So use what you can afford. IF you plan to fly more jets later, then think about investing in a good set of servos thinking ahead

On the radio trays, I prefer the Little JR 285 or HS65, small and good.