I've just bought the HD Remaster. I already own both X and X-2, so I thought to myself why I bought it, exactly. The remaster to X is literally the same as the PAL version I have, although X-2 added the international elements, which is great and I can't wait to see what it's like.
For me, seeing my boyfriend play it for the first time and get really into it - I think that is what inspired me to go through the games again. Also, he'll be able to play X-2 in full HD glory (missed the boat with X, unfortunately!)
What made you want to buy the remaster? Was it that you missed out on the international version of X, or wanted to see X-2 in full? Or maybe you just wanted to relive the games again?