Mcintosh MA 6600 or 2275

The price is within $100 of each other, used. But the 6600 is "several years old and the 2275 was built in 2011 and is tubes totally.
I'm wondering if anyone knows the reliability on either one..

McIntosh as a brand in known to be reliable. If choosing between the two I would purchase the 2275.
Check out these comments:
I've heard the MA6600 and it is outstanding. From what I've read, others feel it is on par with the MA6800 which is supposd to be Mac's best integrated prior to the latest series. Plus you can add a tuner module to it and make it a receiver. I love the looks of the MA2275 plus the tubes, but I think the MA6600 is more bang for the buck. Good luck!