In Maryland near DC
Since you are new to the board, I thought I would point something out that might have slipped right under your radar.
Some of the posters here are contractors (some can be identified by noticing their user names are in blue and they usually say what areas they work in). Well, you hit the JACKPOT! One of the people who answered your questions is "Windows on Washington." Apparently he works in your area. This is one of the most respected posters here and really seems to know his stuff. You can look at one of his posts and click "get a quote" or "contact"--whatever it is, and that is free on this site. I believe another one in your area is "jsmomo"(not positive, so double check). Anyway, he also is very respected here. You have the opportunity of not only asking questions here, but having those people come and answer your questions and do the job.
There is also a general "get a quote" button on the site and I think that alerts all in your area that are here that you are interested in being contacted.
It's funny because some people come here and don't pay attention to this. So they say they live in DC and ask Windows on Washington a dozen questions and get great information, but then apparently go find some schmuch that they never heard of and could never have answered those questions to do the actual work! And notice how classy it is that they don't even tell you that in their posts!
Again, you are very lucky to have at least TWO highly regarded posters that work in your area. A lot of us wish some of those worked in our area!