I'm looking to replace all of the single-pane windows (17) in my 1950s house. I got a quote from Window World for $7K, but I'm hoping to spend less than that if I can. Any other good places to recommend (I know there are a lot of Colorado folks on here)? I bought this house as a long-term flip, so I'm not planning to stay here more than 3-5 years, so price is really the most important consideration for this purchase.