get the hub centric. if the crager wheels fit your hubs, they will fit hub centric spacers.
This gives you more options to mount oem wheels. Plus, better resale in the future if you decide to sell them.
X2
A hub centric spacer will be supported by the hub so it should be stronger.
Also the hub centric spacer will be centered to minimize vibrations.
I have Spidertrax hub centric spacers and do not have and vibrations or anything weird. The vehicle drives the same as before the spacers.