8 is plenty, HiTech has 4 on his AH3 development system. However, 16 isn't overkill. If you do some photo and video editing, that might come in useful. Most likely it won't cure the mini freezes.
If you've got nothing really important use for your money, get 16. However, if you spent that money on your wife/girlfriend that might cure some mini freezes of another ilk.