The bull barrel or standard barrel are no doubt more accurate than the Superlights if you're shooting for groups or colony shooting prairie dogs, but for a hunting rifle where you're gonna be making one shot kills, possibly needing a second shot, the Superlights are just fine, specially when you consider how nice they are to carry. I dunno about you, but I spend a heck of a lot more time carrying my rifles than I do actually shooting them, so weight and handling is important.
As for the sights, see the
Peep and Firesights link in the FAQs, Williams makes 3 sights that mount to the two rear scope mount holes. For the stock you can get a youth stock rather that cut the stock unless you want a specific LOP, ALL H&R single shot stocks fit all of their rifles.
Be aware that the Superlight compact 223 has a synthetic youth stock with sights, the Superlight comes with no sights currently, they've been made before with wood stocks and sights tho too.
Tim
http://www.hr1871.com/Firearms/Rifles/handiRifle.asp