Windows replacement in Denver metro area

[Sean Chen]

Hi, 

I need to replace all the windows in a rental house. The old metal windows are not energy efficient, in bad shape and need of replacement. Can anyone recommend a good company / contractor with reasonable prices around the South Denver area? 

I have checked out with HomeDepot and Lowe's and learnt about the bad reviews on their sub-contracted installation. Though Simonton CV500 from HomeDepot and Pella 250 Series/Milgard Styleline from Lowe's seem to fit my requirement, I am not so sure about giving the work to the big store. Does anyone have good experience with the local HD or Lowe's installer? Would you recommend me going with them or find other windows replacement company? 

Sean