Some experience of different Arcam amps ( including my current setup ) but no experience of the A65+ - sorry.
May be worth asking on the Arcam Owners Forum here - Arcam Owners' Forum - AVForums.com
or asking a Mod to move your post.
I owned one for about 6 years. It was partnered with B&W 601S3s and a Rotel RCD-1070 source. I really enjoyed the sound this combination produced. Arcam amps and B&W speakers really do seem to get on well. I only sold it to go down the pre-amp/processor and power amp route.