Windows: Simonton 5300 or 5550?

I have 18 yr old house with original builder windows. Single pane, Alum frame. They are dreadful, and there are 21 of them.
I have had a few quotes on replacement windows:
Allside windows from some sales person who I actually had to throw out of the house after he insulted my wife: 13K
Long Fence Custom windows (DC Metro Area): ~19K
Simonton 5300 Metro Contractors (DC Metro Area): 10K
Simonton 5550 Metro Contractors (DC Metro Area): 11K
Anyone have experience with either the contractors or the Simonton Windows? I have never heard of them.
Thanks in advance.
Robert
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com 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.