4 player retropie advice

Hi folk,

I am looking at setting up a pi4 with retropie and was going to out it into a 4 player control panel.

Looking for some advice, I am looking a I-PAC Ultimate I/O, spinner ball (connected directly to the pi) and 2 light guns.

1) Has someone had success with this kind of setup?

2) Do the Wii light guns work well or go for the Sinden light guns?