Suggestion,
search the online sites for scopes in the style and price range that you are looking for.
then bring that list here and you'll get a bunch of viewpoints toward each one.
This will get the discussion much more specifice real fast.
I landed an NCstar with variable power, lighted P4 retical, and an integrated laser (for the cool factor i guess) but it is almost 8" in length. All for well under $100. I went variable power since right now i like to shoot at 6x. However, it does look like it belongs on my 22lr-AR better when compared to a full size 12" scope.
Curlyjoe
Correction... it may not be an NCStar will have to confirm when i get back to the casa
Add-on:
try this link to TSG, they have several brands and options all grouped together. you don't have to purchase from them but can window shop. get back to us with your choices.
http://www.sportsmansguide.com/net/browse/scopes-scopes.aspx?c=134&s=6&d=125