Pella or Anderson either will give excellent perfermance.
2 panes of glass with a UV restrictant gas between them to act as an insulation,and to protect the inside of the house from UV rays.And as Shahani said smooth operation,and reliability.Lower heat/AC bills.In a new build, I would say a neccessity
Mom and Dad used anderson in the remodel, it was worth the money
Geez don't anybody watch Norm Abraham??