Norandex (Proview 3401 series) double hung

I've quoted a bunch of companies. I'm in the Louisville, KY market.
Found a contractor who buys Norandex (Proview) at wholesale and only wants to get paid for the installation (no mark up on buying the window wholesale). He's come in significantly LESS expensive than all other bids.

Is the Proview 3401 an inferior window? Proview also makes at 3250 model...which is one step below the 3401 series I've quoted.

The other companies/windows I've looked at:

Champion
Window World (4000 series)
Alside (Excalibur, 8000 Signature & Ultramaxx)
Simonton 5050series
American Craftsmen 1200,8500,9500 (Home Depot)

Any feedback on Proview/Norandex would be helpful.

Yes, I am having the Pro View 3401 Norandex windows installed in just a few weeks. I looked at them yesterday, great deal great bargain, great man to install them!! God is Good!!

The Proview 3401 is the same exact window as the Reynolds 5000 window which I've used a lot in the past. It's a good mid-grade window and will serve you well. The nice thing about this window is the really fast 1 week manufacture time. They have really fast and no-hassle warranty service too. If you need a part you'll have it in a week.