Response time has nothing to do with lag.
You could probably get any TV that's between 18" and 32" (even if they're no name brands) and have unnoticeable input lag provided you have component cables and its a 720p TV.
Ugh, we went over this in the other thread, but to simplify things I'll reiterate here: you're a ******. "Probably" and "unnoticeable" are not the words you should be throwing around when suggesting a $400-500+ purchase.
Anyway,
Cal, I recently bought an LCD TV myself primarily for smash, and I can definitely reccommend it: a
Samsung P2770HD. Supposedly it
averages at 23ms lag, just over a frame in smash terms (within the acceptable range). I personally can't feel it even with timing-sensitive stuff like chaingrabbing with ICs or any melee Falco stuff at all (with game mode off btw), not that that really says anything. In any case, just over a frame of lag is pretty **** good, and it's not even a frame for games like smash 64. Other than that it's 27", has inputs out the ***, and you can find it for
less than $500. Definitely check it out.
If that's not good enough for you then basically Redact is correct, you'll need to convert the AV signal to VGA (HD Fury, etc.) or buy a Wii VGA cable proper (I believe Mayflash makes a dual-Wii/PS3 one), and plug that into a monitor's VGA port, only then will you get the absolute minimum of lag.