The combination of a brilhart 3 with a 3S reed doesn't give you much to push against. depending on how you like it to feel, you may consider either a stronger reed or a more open facing. some examples you may think about:
Joel Frahm (last i knew) plays a slant sig 5 or 5* with a 3 1/2 (i dunno what brand). gorgeous tone, but without a microphone, he can't be heard. wonderful control over the instrument however and the quality of the sound is great.
Chris Potter (last I knew) plays a 7* double ring link with a 4 1/2 something, i saw him with francois louis reeds i think a few years ago. Huge sound, so much that you can practically see it bouncing around the room. He has to work much harder to get that setup to work for him, and he puts a huge amount of air through the horn. However, it is what he's comfortable with.
these are both kind of extreme examples (especially Potter), but i believe that if you want that sound to project, you need to give yourself the room to put more air through the horn, with either a more open facing or a stronger reed, or both.
if you are wondering, i play link 8's with RJS 3M's. it gives me the best balance of control and projection/power that i can find. One more thought- if you feel like there is enough resistance in your setup as is, you may consider having your mpc worked on. It may not be properly balanced and may benifit from a better facing. A good refacer can take a decent amount of resistance out of the piece by working on the facing and rails, which would allow you to use a stronger reed and get a bit more sound. That's assuming there is something wrong with the mpc though, and there may not be.
good luck- no matter what you do, long tones every day. peace- mike