Alside sheffield or Simonton 5500

[howe]

I can get either for nearly the same price. which is the best value for the dollar.

[InfoSponge]

They are both reasonably good mid-range windows. I'd pick the Simonton, other things equal, but you should probably pick the window that comes with the best company/installer, if you are happy with the price/looks/operation/efficiency of both windows.