I've had good results with plain ol' Sugino rings (48/38 shown here):



They were described as "5000" alloy, which is undoubtedly softer than 6061 or 7075, but I don't wear out chainrings very fast, especially ones this size. If you know that you're going to like that combo and put a lot of miles on it, then might as well spring for the expensive 7075 ones. Although I can't help but think the $/mile probably comes out to a wash in the end -- the Zicrals would need to last a little more than twice as long as the Durals to be worth the price.

Thin chainring spacers can be used if the 10/11 speed rings end up too close together.