Never had an Opus X. JR Cigar occasionally offers quality "variety packs" that include at least one Opus X, so I'll probably try one soon.
I bought three boxes of them for about $2500 in Vegas last year, I thought my wife was going to strangle me.
Opus X are good but Padron Anniversario Maduro are better IMHO. You can get very good cigars though without looking for the high-dollar ones. Cubans are good too but when you have smoked enough of them you come to realise they are not *that* much better and the quality can be a little uneven.