[Formendacil]

Quite apart from the case of Gimli (who, in any case, is too much of an apparent exception to be looked at too closely except as evidence that it is possible), I don't think it is, ontologically, a problem to say that Dwarves would find Elves attractive--assuming they could get over several thousand years of racial hatred and an understandable preference for the familiar over the unfamiliar (which is as much or more likely a default as trite saying that "opposites attract").

The reason I think this has to do with the origins of the Dwarves: Aulë made them because he was impatient for the Eruhíni (so were the other Valar, but that's decide the point). They were also made in imitation of them. On these bases, I think it is likely to posit that the Dwarves would still recognise Elves as the ideal on which they were based--even if it was only in some sort of subconscious matter. After all, I highly doubt the Dwarves would go around saying "we're poorly patterned copies off the Elven original."

The chief way to counter this, I suspect, would be to say that when Eru gave them souls, he also gave them a distinct sense of beauty and/or a preference for their own kind. While this is undoubtably true in part, I shy away from saying that Eru would have categorically overridden their recognition of the bodily beauty of those on which they were patterned. After all, Eru did not so much turn Aulë's creation into the Children he was trying to imitate, but merely gave them what Aulë could not: independence and a soul. Thus, it seems to me that the Dwarves would be able to recognise, by themselves, what Aulë had recognised before them--namely the beauty of the Elves.

None of which answers the question certainly, but I think it's a good starting point.