i use editplus for html and xml stuff... for a while i used komodo.
at work i use dreamweaver O_o..
for the most part html suites i've used have all been the same just with live previews/code-context menus/etc. Most of the time I need to to test things on a server anyway, so offline testing isn't a big thing.
I like edit plus though! unlike dreamweaver it never tries to do things for you (usually incorrectly), it "colors in" CSS better.. and it's generally easy to reconfigure it to nicely display "new" xml tagsets. Oh yeah, and it's about 1/20th of the price (of Dreamweaver).
Dreamweaver's offline SSI emulation is a nice touch, although it's hellabasic..