haven't tried the harley benton but I prefer any newer schecter 8 strings to the RG8. The neck isn't quite as flat as the RG8 (a little bit more d shaped but not terribly so) and from my experience the 500$+ schecters are quite nice. I would take a schecter over an RG8 any day as they seem to have better fit and finish, plus they have 28" scale lengths. The RG8's stock pickups are atrocious imo, though some of the schecters in the same range come with EMGs or passives (and not in a weird soapbar route like some of the earlier RG8s where they basically used bass pickups). If you can, I'd say look for a damien elite or one of their higher priced 8 strings used. I got my Avenger 8 for less than half of what they cost new and it more than holds its own with my other 8 strings.