I have heard the Mac and until recently owned the Bat VK300XSE with 6h30 supertubes, remote and phono. I loved the Bat, the thing has power to burn, especially for your 805s speakers. The personality of the BAT tended toward the ever so slightly dark side...not a negative at all as the B&W's need it in my opinion. The BAT only has 1 single ended input (2 if no phono board I think). It has been awhile so I won't offend the intelligence of this group by doing a comparison from memory over a 3 year time period. I liked the Bat alot but I went all tube Cary. If I were going to buy the BAT again, I promise I would buy the version with the 6922 input stage so I could have some fun rolling tubes. You can't roll 6h30 tubes as they all sound so similar....not "tubey" enough for me over the long haul. Good luck.
Geoff
Geoff