.. My Question is.

1. Does this sound adequate.

No, my SWAG (no calcs) would be a 4 x14 but someone's got the run the
numbers

2. What would be the equivalent LVL beam(s) (ie: microllam) to use
instead of using wood? I would like the reduce the depth of the header
so it will not be as notciable. .

Reducing the depth is asking for trouble unless you go to steel.

If you really wan to make the header "disappear" completely you could:

Shore in the basement & the first floor on either side of the exsisting
wall.
remove the wall
cut second floor joists back to allow for a steel beam ~the depth of
the cut joists.
Install hangers & the beam.
close the ceiling,
remove the shoring.

no visible header, but a lot of work

cheers
Bob