Depends... Who is getting the IDL...? and how badly do you want the one(s) you don't have?
O/M aren't so common, rare to get a pair... Not made anymore.
IDL are still online, Color... Don't forget the IDL 15th anniversary is comming out at the end of the month too.
Personally, I would stick with the IDL... I haven't had a O/M pair... but I know the IDL (In my book) out-ranks in features and color... IDL you can add more wallpaper/items while you cannot with the O/M pair....
Vintage Vs Fairly new/ still being made....