I have owned both and from memory the b1ggest differnces that come to mind is as follows: (preface listed as advantages of 134 over 132)
-Better processing chip the latest at the time expecially on pro logic
-more extensive user interface for adjustability
-134 is built more as two in one, the stereo side is basically a C45(or C46 memory fades) so the two channel performance is more in line as a seperate pre amp from the processor side.
-better power supply
One other point is the 134 is the same basic platform for the current 136, I had traded the 134 in on a 135 but recently traded to Anthem D2v. My experience with the anthem is that mcintosh is much better in 2 channel. My point is if 2 channel is important look at the 135. Hope this helps the Sunfire is a great peice but in the long run I think the McIntosh will deliver better performance and offer greater durability. All MHO of course taken from ownership of the 2 you asked about.
-Better processing chip the latest at the time expecially on pro logic
-more extensive user interface for adjustability
-134 is built more as two in one, the stereo side is basically a C45(or C46 memory fades) so the two channel performance is more in line as a seperate pre amp from the processor side.
-better power supply
One other point is the 134 is the same basic platform for the current 136, I had traded the 134 in on a 135 but recently traded to Anthem D2v. My experience with the anthem is that mcintosh is much better in 2 channel. My point is if 2 channel is important look at the 135. Hope this helps the Sunfire is a great peice but in the long run I think the McIntosh will deliver better performance and offer greater durability. All MHO of course taken from ownership of the 2 you asked about.