The problem for me is usually one of fit; and that is an excellent link- the next issue for me is finding one that is affordable. I'm kinda leaning toward a barbuta, simply because I like the look but if I'm not mistaken, there's no knightly precedent for their usage, so I'm open to an open-faced bascinet w/aventail perhaps, pun intended.
Or THIS: http://picasaweb.google.com/smokedim/Bascinets#5449681553069921954
I've seen one just like this somewhere...I think I saw it in By-the-sword's new catalog of 'battle-ready' helms. Now I'm not sure because I went back to that site and nothing doing.
Edited to add: found it!
http://armourandcastings.com/index.php?_a=viewProd&productId=254Or this one:
http://armourandcastings.com/index.php?_a=viewProd&productId=244