i have owned both mac and classe gear and i wouldn't call mac gear slow. i would think it would depend on the amp and speaker combination. i have heard the larger macintosh monoblocks (1000's), the mc352 and mc500 driving the larger snell and krell speakers and they were not slow. i used to own the mcintosh mc202 amp and the ma6500 integrated. when using these pieces with my totem mani 2's, they didn't do the speakers justice. when i demo'd the mcintosh mc352 amp with the mani's, it was night and day difference. the 352's had the power to drive the mani's. i used to own classe gear (ca200, cp 47.5, cdp 1.5) and i would say that the classe gear that i have heard/owned sounds very similar to the mcintosh gear i have heard/owned.
i agree with nickt above, it is all about personal taste.
i agree with nickt above, it is all about personal taste.