If you're a nut for great story in games this one surely doesn't disappoint!
Also, The reason x-2 was horrible is because the original head of Square stepped down after X so X-2, XI, XII and XIII are all done by a different leader (hence why they are drastically different than other FF games).
And X-2 was terrrrrrrrrible. I like 8 more than 7 but I think it's because the hype killed it. Everyone was shitting themselves over how great the graphics for that game were and I thought they were horrid... for the record I played 8 before 7.