Arched casement windows - experience, hardware?

I may be tasked with building several arched, casement windows for a home renovation project and I was wondering if anyone had any experience with this. I'm also wondering about hardware. A quick google search turned up several suppliers, but to be honest the $15 to $30 price tag for catches and stays has me a bit concerned about quality. I don't *need* to spend as much as possible, but the client has fairly deep pockets and I just want to be sure of everything being solid, well functioning, long lasting and attractive. TIA JP
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Site Timeline is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.