About a year and a half ago, we replaced every window (28 of them) in our 153 year old house. We wanted to maintain the character of the house (we live in a designated historic district) and therefore tried our best to match the old windows as closely as possible. We went with these
Marvin Ultimate Insert Double Hung Window - Marvin Windows and Doors
We chose the simulated divided light version, because the authentic divided light ones had muntin bars that were too wide and didn't look right.
The new windows look great, both inside and out. The only real difference is that the glass is clear and flat, instead of being wavy and bubbled in spots like the originals. As a bonus, we were able to ditch the ugly aluminum storm windows.
It ran us about $1000 per window, installed.