In two words or less- probably yes. Conventional wisdom is that, all things being equal, a lower output MC will outperform a higher output MC with a small part of the improvement offset by the higher gain (higher noise)needed.
With respect to phono pre-amps, you will probably hear a significant improvement with the ones you mention over the inboard unnit on the Mac. However, I would recommend that you look into an entirely different pre-amp such as the Audible Illusions with the Gold Card phono section. Superb tubed pre with superb tubed phono section. About $1500 for a good used one. There are several other great pre's with excellent phono sections out there, too. You'd improve your ENTIRE system going that route, rather than just part of the analog portion.
Regards
Jim
With respect to phono pre-amps, you will probably hear a significant improvement with the ones you mention over the inboard unnit on the Mac. However, I would recommend that you look into an entirely different pre-amp such as the Audible Illusions with the Gold Card phono section. Superb tubed pre with superb tubed phono section. About $1500 for a good used one. There are several other great pre's with excellent phono sections out there, too. You'd improve your ENTIRE system going that route, rather than just part of the analog portion.
Regards
Jim