The purchase of the McIntosh MC-225 and the McIntosh C11 sounds like a good deal. I probably would ask for more information on what is means to "been gone over by a pro and been refurbished".
Were any parts replaced? What exactly was refurbished? Are all the parts replaced using McIntosh parts? Do the components come with any warranty? I would confirm that all speaker connections and RCA jacks are rust free and look good. What happens if after 6-months or a year, you have technical issues with these components? Are parts for the McIntosh MC-225 and the McIntosh C11 still available and can you find someone to work on them? What is the condition of the tubes and cost to replace them?
Can you audition these components before you purchase? I suggest you compare the McIntosh MC-225 and the McIntosh C11 units vs. a new integrated amplifier priced around $3,500 (your budget price). A newer unit might sound better, provide peace of mind since it is new and a path for improved sound quality in the future. Just a thought.