What is the range you hunt at with that rifle? That would be the deciding factor for me.
If with that rifle you normally hunt timber, and occasionally take elk from openings with ranges up to 500-600 yards max, I would go interbond.
If with that rifle you are a ridgeline hunter like me, and spot your game anywhere from 500 yards to several miles and get to the most comfortable shooting location under 1,000 yards (depending on conditions) and take your shot, I would go for the eld-x.
The group I hunt with has an average range of 720ish yards on the last 12 elk we have taken. We have used Bergers mainly and they have been great. For my timber hunt gun, I have a 20" barreled .308 win loaded with a heavier constructed 165 grain bullet. That is probably why I have never had a bad experience with a berger that I occasianally hear about.
The right tool, for the right job!!