here you get the mesa for 700 and the engl pro for 600 so thats not a big difference.
Have not played through either. But I can tell you that when I was hunting for a solid can to play through a Harley Benton was on the top of my list.
Judging from your recent spate of posts, it seems like you're starting out. So I'd say Harley Benton.
yep
I am also thinking about puttin 2 v30 on may marshall 4x12 cab with g12t75
what about this?
I see much more Marshall cabs in professional studios than Mesa cabs.
That may be true where you are but it isn't true here.