I would stay clear of the new Apple earbuds because they have 4 contacts on the plug. Due to how the Uniden AF amp works, I'd be scared to put in a 4 conductor plug into any Uniden (or GRE/Whistler)
When looking for ear buds, look for ones that have different sized gel ear inserts. We all have different sized ear canals. I make sure with earbuds, they come with 3 different sized ear gel inserts.
Try searching Amazon for earbuds and read the reviews. I've found the reviews on amazon to be very good.