You should take a look at what Sears has to offer. Good quality windows and a reputation of standing behind what they sell. Not the lowest price, but who would brag about that. The quote you received is way high. E-mail me if your interested in seeing what Sears has to offer. Good luck!
i live in RI. sears recently quoted me $8000 for two windows.
a 3' by 3' garden window = $3500!
a oversized bow windown ( 7' by 5' ) = $4500!
this is installed price for the least expensive Sears replacement windows after an allowance for a 15% discount and an extra discount "if i buy now"
ok maybe i can see the possiblilty of $4500 for the big bow window
but there is no way i could ever consider $3500 for a 3' x 3' garden window. isn't that nuts?