I have heart both now. The MC75 indeed is beautiful, but the MC2301 plays in a different league. By the way, I have Quad ESL 2805 speakers and they well appreciated power. For both power amps a power cable upgrade made the lower end more powerful and controlled. I was under the impression, that the MC75 may have more of a tube sound in mid/high compared to MC2301. But the latter just has a more balanced way to express itself (and definitely more headroom). As pre-amp I used the C22 and the C1000 tube version. Also, connecting the MCD500 directly into each power amps was not bad at all. However, pre-amps definitely improved soundstage, bass-control and sweetness.
At the end of the day, it is a question of budget. I believe the MC75/C22 anniversary set is great for the price. Victor, can confirm that (by the way Victor, I came to your flat some time ago to listen to your equipment when Ric brought the tuner). Exchanging the C22 for a C1000 makes a huge difference, but also costs some money. Even more true for MC2301.
M