I guess it depends on your definition of "easy"...
If you're looking for the most "Mac-like" experience (i.e. something close to how the Finder works), I'd recommend NetFinder:
For pure speed and maximum BBEdit compatibility, Interarchy is the best bet, but it's got a lot of "extra" functions which are pretty superfluous.
and Vicomsoft FTP client is pretty good, too:
And, finally, Panic's Transmit is okay, too, but lacking some major features that the above have.
All of the above have free trial periods, so it'd wouldn't hurt to give a few of them a test drive to see which one you like best.
Fetch is always a good standby, but it's showing its age now... and lacks a lot of the handier features of the above.
Hope this helps!