Sounds like you have a pretty nice rig already. If you do anything up grade the scope to something like a 2.5x10x40mm Bushnell 4200, Weaver Grand Slam, Nikon Monarch etc.
AWS
You must be a mind reader! 
I just looked at the bushnell this weekend and for the money it's pretty darn nice. BUT Leupold has some nice scopes in that price range too.
Leupolds are hard to beat- esp with thier warranty, and my buddies have Nikons and swear by them. IMO $100 scopes are crap in low light- that's when you get what you pay for in the lenses, coatings, and R&D that went into the design. I had a cheap simmons for years... then switched to a Leup. VX-III and 'saw the light'
