I think the Peterbilt 589 is okay. I prefer it with the squared headlights like the Peterbilt 379 had. There are conversion kits for 589 owners to make their headlights square.
Don’t forget the older
351/359 round headlight kit, which is a common option for
379/389... and surely will be an option for
589 (BTW, if follow the pattern, the new model must be named as
399. But, this name may be strongly associated with malls, sales etc.
).