It really depends on how you plan to use the car and what your budget is.
I think the poly bushings are great. Reducing the amount of flex at the LCA pin greatly improves the accuracy and feel of the suspension. But, you don’t need that if you’re just building a cruiser. And, I don’t install the poly bushings unless I’m also installing greaseable LCA pins and adjustable strut rods. I mentioned why in my last post, using the poly bushings makes the length of the strut rod more critical, and the stock strut rods don’t usually cut it. Suspension is a system, the parts have to work together. So if you want to upgrade to poly bushings you should upgrade everything they depend on too.
If you want to use the stock LCA pins and strut rods, I would stick with rubber LCA bushings. The last set I bought was Moog, they seemed fine. I’ve never heard of the brand you bought.