McCormack and Vandy have a long history of playing well together. I’ll give you two options of excellent candidates, but I’d recommend the cheaper version because your speakers have powered subs and it’s got a lot of Steve’s latest upgrades already installed so you’re getting a SOTA amp at a screaming bargain. My only recommendation with either amp would be to send it to SMcAudio and have the gravity base installed — by all accounts it takes the amp up several notches in performance. I’m having my DNA-0.5 RevA upgraded now and sprung for the gravity base. To me this will be a keeper amp for life
https://www.usaudiomart.com/details/649881609-mccormack-dna-500/