I bought a set last year made by Northcape International and I've been very happy with it. The line is called Tybee but there are many different styles. The cushions are super comfortable. I bought locally but if you google it there are lots of online dealers. It's pretty high end but not as expensive as RH and supposed to be much better quality. Mine has been in the elements for a year (though the cushions have been stored) and looks brand new.

I haven't looked at either sites to compare prices, but have you checked out Plow and Hearth? I have an all weather dark hunter chaise I bought probably six or seven yrs ago. It sits out most summers until Fall under a privet arch. Very sturdy, well made. Only after all this time I still can't afford the cushion for it.