At present, for me...
-ANH/ESB/ROTJ are almost all 3 tied... I can't say I like one of those films more than the other, as I like all 3 for different things... Either for being the "first", or being a more in-depth story, or for having the most intense action... That's all my #1, a 3-way tie.
-ROTS... Easily the #2 slot then since I condensed #1.

ROTS was good I think, but I agree with Dave that I don't think I'd replace any classic film with it. Call me crazy but I like Ewoks, I think the Sarlac SE battle's as good as it was pre-SE, and the space battle in ROTJ still is bigger and more "wow" to me than the one in ROTS...
-AOTC is next, and it's a good solid film IMO. I can stomach the few love dialogue moments I dislike, for the action.
-TPM is last and has the most flaws. A bad child actor, and a CGI character that should've spoken with subtitles and 3PO translating... And had his time cut down.