RE: Spine check please?!
I'm not fam with the current Cabelas arrows- typically they have been low quality shafts made by Beman/Easton or CX branded with the Cabelas name. This was not always the case (at one time the Stalkers were very good quality pultruded carbon arrows made by Custom Archery equipment), but has been for quite some time.
Beman ICS Hunters (size 400) and Carbon Express Terminators (size 45/60) would both be real good choices for a quality medium weight arrow at a budget friendly price.