Replace the $70 Katadyn filter with a $20 Sawyer filter.

Replace the $60 Petzl with a $20 Wowtac A2.

I am also looking for a set of hiking poles.

The $30 Monoprice CF poles are considered the best/lightest for the money. You really don't want heavy poles.

Do I need any other cookware?

Are you planning to actually cook or are you eating trail mix the entire time?