Dreamweaver is by far the best web code editor I have used, however I work on a mac, and still love to use text wrangler. Text wrangler is free, and if you are only working with HTML/CSS is a powerful editor for you.
For a PC, I've used Komodo Edit, and wasn't too much of a fan. I think it was me more than the program, but I didn't use it long. For the PC I am a fan of Notepad ++, which at the time that I used it, the program was free.