" We are considering Jeld-Wen Siteline Series Casement windows "

If those are your only choices, take the Andersen 400's, never anything Jeldwen (junk). You are going with full framed replacement windows then I presume? Why only those two options? Have you looked into actual insert or replacement windows?

Of those 2 choices Anderson but I wpuld need to see your house , understand buget issues. IMO windows are not a place to cheap out so get the best you can afford always. Sun comes in windows I use solar shades for those I do not like tinted windows ever , I also do like casement window sin windy places and Chicago is definately windy .

In that binary...I think the 400 is the more well regarded product.

Still in sticker shock on Anderson quote for our house but Husband specs they on lots of commercial jobs and says they are good. I don't think they offered a wood option. Marvin is another respected brand.

kathleen - Who did you get your quote from for the Andersen 400 windows? I'm surprised by your comment that they don't offer a "wood option" - are you looking for wood on the exterior?

When I replaced my windows I used Andersen 400 double hung insert windows. I've been very happy with them. I also looked at Marvin Ultimate - they looked like a nicer window but the pricetag was too high. I have no experience with Jeld-Wen.