i wasn't impressed with the prices or selection of 'upgrades' at the dealership and i want to blow a credit card on some new pieces for my car. Anyone have suggestions on good places online to get these for my shadow mica xb?

front and rear taillights
15 or 16" wheel package
armrest
interior lighting?
replacements for those cheap visors

 

Check out group buys and the sponsored sales here for the lighting and such. There is always something going on there.

As far as wheels, start at tirerack.com or sites like that.

Head/tail lights, start with ebay or once again the sponsored sales section.

Armrest go with the 2 more accepted ones, Boomerang or Zeta. I believe allscion.com has the Zeta ones. Don't remember where the boomerang is though.

Visors, I couldn't tell you.