"I think Kyouya x Haruhi is one of the most unbelievable and the only reason they might be remotely right for eachother is simply because Kyouya is more mature than the rest of the group."

And I think that it is most believable because that maturity actually seems to make him the only person sans Mori and possibly Kaoru who actually comprehends her feelings. Opinion's a funny thing, huh?