SOG has earned my trust several times over, usually fairly significantly underselling the quality of the firearms. If you want one, I see no reason not to buy from them.
From my experience SOG is very accommodating when it comes to requests on the Hand select. Back when I ordered my P-1 I asked specifically for a hex pin model and thats what they sent me.
I notice SOG's current catalog has P-64s again, though they aren't available on the site. Are they trickling back in to retailers?
http://www.southernohiogun.com/current-catalog
Can't speak for every one, but it's just damned fun to shoot. And relatively inexpensive to shoot as well.
So happy with my first one, I bought a second. :)