I would guess that a decent research mic with the possibility of phase
contrast and UV fluorescence would go a long way, If it is possible to
get cross polars as an accessory that would be great for some of your
You will have lots of people trying to sell you laser this and laser
that - forget it for the present, BUT, get someone who knows how to set
the microscope up and keep it clean and aligned - not many graduates can
do that any more !