Strangely enough the Toshiba 1402 (x12) i owned some months ago could rip encrypted DVDs VERY fast. If i remember well i could easilly hit x9-x10,5 speeds.
I have heard other guys complaining about their 1502. I think their firmware are locked to low rip speeds.
Anyway, i suggest you get the 1402 instead of the 1502. I do not think you will notice any major differences plus that the 1502 can not rip fast.