The only really good speakers I can think of that are actually designed to be used that way are the Wilson Duettes, They aren't cheap though.
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Paulsax asked "aren't there some Dyn's with front porting?"
Dunaudio used to sell a small, front-ported speaker called the Audience 42W. I use a pair of these in my office system w/ a classic Luxman integrated amp and I think that they sound great. I believe that the replacement product is the Audience 42 SAT. I haven't heard one so I can't say if it's the same or not.