Personally I would leave it where it is and have a little more safety
factor. I would also buy a larger and better quality pump. In fact I did
a

What safety factor? The water table either wants to rise higher than
the floor, or it doesn't. If it does, the pump can either keep up, or
it can't. Starting to pump sooner if the pump can't keep up doesn't
make you safer. A second pump set to start about 2" higher than
the first is a good idea, though.