P.S: Which grading service do you prefer: NGC or PCGS?
My "penny" worth of info ...
NGC or PCGS? It depends on your personal preference. The slabs slightly differs and do not look the same.
Personally i don't care if the coin is graded by NGC or PCGS. (Most of my coins are graded and rest in NGC coffins as mentioned)
Most of my coins are proof coins. I always prefer to get them graded and for protection against damage.
I can send you a picture of one of my gold proof coins with a nice fingerprint on it. One of my Dumb%&^$ friends contributed to this.
If you are only interested in grading a few coins then i would suggest you find a dealer to submit the coins on your behalf.
It is not worth the money to subscribe as a member in order to submit only a few coins.
I will try to find more info on dealers in Europe who will submit coins on your behalf since no other WOC member in Europe seems to grade coins.