Yes Terry, do give the bari piece a try. I too was a devout Berg user on bari, and then I tried a Rico Graftonite... It was amazing. I then had the chance to get a new-old-stock Metalite and wow! It turned my Mark VI into a screaming rock horn.
For me (remember I'm a rock player on bari) the biggest problem has always been that the Bergs tend to "break" when pushed too hard. The Rico mouthpieces just don't do that. None of the notes break when you force a lot of air through the horn for maximum volume. What you do lose with the Ricos, is some of the lushness that the Bergs are known for.
For jazz I still use my Berg hard rubber. For R&B I have a Berg stainless steel. For rock I use a Metalite. YMMV of course, and probably will.
The Metalite is versatile enough that it can be used for many applications, but for a true section sound, it will probably not blend very well (unless the other sax players are using them of course).
The Graftonite is a very good mouthpiece in its own right, and is very under-rated. I have a couple of them, and use them for a variety settings still.