you guys are more hardcore than I am and want to know what products, gizmos you would recommend me get to update my night setup...

I have been a fair weather commuter and I will ride a bikes direct steel road / touring bike (low end).

I use an ortlieb backpack to carry change of clothes.
I have
- a reflective vest (chartreuse).
- a cree 1200 lumen rechargeable head light (off of amazon) and white reflector for the front
- a serfas taillight with a seat bag that has reflective stripe and piping.
- a shoulder blinkie (usually worn by walkers / joggers)
- a helmet with reflective stickers on it
- a gizmo called "safeturn" which is a "turn signal" system that attaches to your wrists.
- two lights (one per wheel) that attaches to the spokes.

anything else I need? is what I have overkill? last season I was going to handle night riding but chickened out...