Korbanth sabers are a nice budget option for saber hilts that are fx installable. However if you are a discerning collector that places a premium on screen accuracy, they will need a lot of work to get up to snuff. Every single hilt I have ever purchased from them have needed "accuracy kits" offered by other vendors to make the hilt more movie accurate. However if you just want something middle of the road and a little more higher quality than a typical black series saber then Korbanth hits the right buttons. Budget friendly and about 80-85% movie accurate.
As far as helmets, I have heard some mixed reviews of his helmets. The Boba Fett offerings in particular are not very well done. What helmets were you looking at?