I just heard a pair of Proac D38's, $9K (big brother of the D28) with a small Primare integrated amp and CD player( under $5K for both). I have not heard Proac speakers in years but I was shocked at how good they sounded together. I could happily live with them. As a former owner of a MF TriVista 300 amplifier I believe that the Proac's would work well with the MF amp. With that being said, I suggest you try hearing them together. Perhaps your dealer will let you set your amp up in his shop, or better yet, let you try the Proac's in your room.
Good Luck
Good Luck