RE: Sights
Like said before there will be lots of opinions. Viper is a Good sight as are Spot Hoggs. Octane sights are also worth a look see. If you are interested in a single pin rear slider then HHA has No equal.
If you are looking for a Good quality sight at a lower price Impact makes a nice sight.
A sight is and should be considered an investment to be passed on to other bows for years.
Dan