I just traded into one of these and the night sights are dim………. Recommend me a good set to replace them with. Do I have to use Kimber sights or are there similar sights that will work?

Front dovetail on a kimber is pretty much a novak cut.  They don't call it that so they don't have to pay royalty to novak.  If you like all black rear and tritium front(like me) go to Harrison custom for front and rear kimber options.  Another option if you like 3 dot night sights, but prefer black rear is tritium pro night sights.  I've had those on kimber and glocks.

I have purchased OEM meprolight sights with the Kimber cut and been quite pleased.

MGW sells them. I got a set of “tactical wedge” sights to replace the suppressor height sights on a gun I had no intention of suppressing.

If you want something a little fancier, Heinie makes Kimber cut night sights.