Just got a new bike, a Scattante R-670, this is my second road bike. My first is/was a good ol classic Peugeot (80's something).
Anyways, My question is this, I got a bout $200 to spend on additional items for cycling and i'm wondering what i should get first (already have a helmet, bike shows/pedals, mini toolset):

Im thinking of getting a trip computer/Cateye?
What else will come in handy?

I'm planning to ride at least once a week 20+ miles each time