The one guy I originally called in to check on Gorell. But apparently since they went into bankruptcy and were taken over by soft-lite, all warantees are void on all windows sold after the bankruptcy, so the company won't install Gorell anymore.
That is completely false. All Gorell line windows manufactured after February 14, 2012 are warrantied in full by Softlite. A Gorell 5300 purchased today has the same strength of warranty as a Softlite Elements... MOST of those (Gorell products) purchased prior to that date are warrantied as well, as Gorell dealers have been given a credit by Softlite to be used on warranty claims for product that was made prior to that date.
On the difference between Softlite and Sunrise, they are both very good and either would serve you well. I'd personally choose the Imperial LS given the circumstances, unless a comparable Sunrise Restoration or Vanguard came in significantly cheaper.