My husband replaced all the windows in our home. It's a BIG job, but he's "that" guy. If he can do it himself and save the money, he will. We bought Andersen windows through Home Depot and they're great. Tell your husband I think he's wise to try the two and see how it goes. My husband did ours in small groups so as not to get too overwhelmed with the project (and to spread out the cost.) Plus, many of our windows were a standard, readily available size, so we only needed to custom order a few. Keep that in mind with the "custom made" window thing. They're jacking the price of a window they've made a thousand times and telling you it's "customized" for your home.
So glad we went this route. I also met with several window companies and hated the sales approach. I had the same horrible experience with Empire for carpeting. Do all these guys go to the same sales school? Yuck! I kicked every one of them out the door and felt like I had to take a shower after.
Good luck with your project. You can do it! L.