Not for nothing, but...Storf said most important, not best.
Raising Hell was the first rap album to go Platinum and Licensed to Ill was the first rap album to top the Billboard album charts. Clearly both albums were/are hugely important in the history, and popularity, of hip hop. I'd say Raising Hell was significantly more important, while Licensed to Ill has been more popular, but that's just my opinion man.
Now, either way if it's one of those two albums, they are not hard to get quality reissues of in basic black, for relatively cheap, but so was How I Got Over and that's sold out, so clearly VMP know their market. As I like colour variants, and stencils I'll never use, I'm in for either.