Noctua D14 -> Prolimatech mega -> True / H50
when dealing with i7 OCs over 3.8ghz from all the benches i have seen.
I went with the D14 and sitting at 54c under load with my c0 step i7 920 at 3.66ghz 1.232v
an antec 1200? i can't imagine there is much that won't fit in one of those.
but yes, the H50 isn't that great a cooler. not really worth buying over any of the other air coolers mentioned here.
Stock H50 I would in some cases agree, but the H50 has the potential to be far better than any air setup if you are willing to mod a little. Check out some of the H50 enthusiast forums its pretty incredible what that thing can do with some minor mods.