Lovely, like a super old skool Ben Sherman... I know the brand is mud now but when I was a kid I'd pick up 60s/70s examples for pennies at jumble sales... Had a beautiful tight fitting pink one that I'd wear with my favourite suit, it was the fucking bollocks...
http://www.mercerandsons.com/ for button downs
The new anglo italian button down oxfords look like they'll be great too, but probably pricier
they both have that nice curve to the collar when buttoned down as it's cut slightly longer