I agree with Rightarmbad in that its surprising that you're considering just these 3 skis.
I'm wondering what sort of conditions you'll be paddling in most of the time. Flat? Ocean downwind conditions? The sort of mixed conditions you see in Harbors, etc...? I'm assuming you raced the XT; was it a downwind, or flatter conditions?
I think the answer to your question may hinge on some of this combined with your comfort level/skill in conditions as well as with your expectations in regarding to getting 'stuck in'/putting time in the bucket (are you going to be out there 5 days a week in conditions working on your stroke, fitness, downwind skills, etc...).
I think the skis you've listed are 3 very different skis that in advanced novice to intermediate hands are likely to produce similar results. I would think that which you would choose likely comes down to personal preference in regard to fit and feel (don't discount how they fit and 'feel' to you, this is a very personal thing and what may work for one may not for someone else). I like the V10L but can't really think of a situation I would choose it over my V12. The Legend is a great ski, but with its chine has a different feel to the others and is likely to yield a bit of speed to the Elite if you're equally stable in both skis... My finding was that the Legend is a good bit more stable than the Elite and thus I'm probably as fast without using as much energy staying upright in the Legend versus the Elite, which is a bit tippy for me. Give an elite level paddler the 2 and I suspect the Elite would be faster. To me, the V10L is a great ski, but I cannot really find any reason to paddle it when the V12 is available. The V12 is faster, has a great bailer, has a great bucket, and is just as stable with a bit more secondary stability in my opinion. For me, I think I'm a shade faster in all conditions in my V12 versus the Legend or the V10L. Again, I think the Elite is a different ski and is faster if you have the skill set to paddle it comfortably. I do not. Again, that's just my take as an advance beginner/intermediate who paddles in mixed conditions. I think materials and finish are a wash on the 3 skis you've listed, they all seem similar in those regards.
I guess in the end you just need to find a way to paddle all of the skis you're considering and figure out which one works best for you... But I'd ad a few more to my list if I were you...