Pelvicachromis Taeniatus Moliwe

I recently picked up a pair of these magnificent fish. boy are they pretty.
I put them in a 55 gal tank with some cories and some killies and they seem
to rule the roost.
my questions are as follows:

if they are getting ready to breed should transplant them to another tank or
will that ruin the mood?

has anyone had experiance with these? I keep mostly killifish and am new to
cichlids. (I got these for my girlfriends B-day, she thoughe they were
cute.)

Any other pointers that anyone has would be greatly appriciated.
thanks
Sam