Most likely you scope experience has been with a high power scope or one with a small field of view(FOV), lower power scope and or variable set on the lower power offer very fast target acquisition, even tactical teams use low power scopes and close combat requires quick target acquisition. The higher the power, the smaller the field of view. Up close and personal, a shooter wants to use a lower power setting for quick target acquisition, when the target is farther out, a higher power setting is beneficial.
So your optical needs will be determined by what you'll be shooting and the range you anticipate. For the Hornet with it's practical range limit of 150-200yds, a 3-9x or 4-12x should be fine, for the 223 with it's range limit extending well beyond the Hornet, a 4-12x to 6-24x might be in order, again depending on what ranges you anticipate you'll shoot at. For target work the higher power options are the best choice, but for field work, the variable comes in handy as it can be set to the lower power for close anticipated shots, and if a long shot presents itself, you can always crank the power up.
As far as sight options, H&R will put sights on any accessory barrel for about $50 if it isn't offered that way. The Superlight Hornet, 223 and 243 accessory barrels are all offered with iron sights standard, although the complete rifles have youth stocks.
Tim
http://hr1871.com/Support/accessoryProgram.aspx
