Hi Sister and welcome to the forum. Regarding the Celtic styles, I guess the big question is why package of BIAB you are purchasing as the different packages come with an assortment of styles. With this said be sure to call PG Music before you make your purchase and I would bet one of their very competent people will guide you through the purchasing process that will get you the best bang for your dollars.
Also a regular forum member here "Notes" Norton markets his own BIAB styles, so if he does not pick up on this thread you can visit his web page by clicking
Here.
I am enjoying the slide shows on your website as I type this reply, sure is uplifting to see all those little smiling faces.
Good Luck and come back often.