What about these,
49MU7000,
55MU7000 (
and another web one), and
55MU7070? I think it's a Belgian store right?
About the previous comparisons, I was looking at the USA versions of MU7000, and apparently they're not the same as the EU MU7000. It's a bit confusing, but apparently the EU MU7000 = USA MU8000. Weird I know, but it's Samsung (Not just Konami is weird, lol). In this case, I very much recommend the MU7000. The difference between the 49" and 55" linked above is 60hz vs 120hz. That 55MU7070 linked above is cheaper for some reason, sitting in between the 49" and 55" in price. Don't know if you want to go for that one instead. If so, I'd call them up if I were you and ask about the difference between that and the 7000. Sometimes the difference is just the stand, or something irrelevant.
If you want to stick to your budget however, definitely go for the 49MU7000, even if it's 60hz. It's superior to the SJ810v.
Try checking out the 49" or 55" MU8000 (I think it's the MU8000 if you guys get US versions. If EU, MU7000). Or the LG SJ810v.
You guys can check out this review:
And
this from avforums.
The ones I've seen have ok input lag, around 30ms. I think it depends on the model though.