Congrats on your excellent new speakers. If I'm you I'd call Martin Logan to see which amps they'd recommend that drive their speakers well given their fairly uncommon impedance curve. I'd also read a bunch of ML speaker reviews to see if reviewers found any particularly good synergies with any amps. This will at least give you a good starting point.
Since you're relatively new to this I'd strongly encourage you to audition several amps (in home whenever possible) before making any decisions given the substantial outlay you've made on speakers. Lots of amps will sound very good with your speakers, so don't marry yourself too quickly to McIntosh before you've heard others. That could be a huge and costly mistake. Take your time and get it right. It'll be worth it in the long run.
Lastly, are you married to an integrated or can you do separates? Going with separates will open up your options considerably. If you do go separates then the preamp you choose will become as, if not more, important than the amps. Best of luck.
Since you're relatively new to this I'd strongly encourage you to audition several amps (in home whenever possible) before making any decisions given the substantial outlay you've made on speakers. Lots of amps will sound very good with your speakers, so don't marry yourself too quickly to McIntosh before you've heard others. That could be a huge and costly mistake. Take your time and get it right. It'll be worth it in the long run.
Lastly, are you married to an integrated or can you do separates? Going with separates will open up your options considerably. If you do go separates then the preamp you choose will become as, if not more, important than the amps. Best of luck.