Good hair styling tools

I've been trying to find a good styling that would not completely damage my hair.so far I've come down to two option either a blow dry brush or a Straightener but I'm confused on which one to buy.

I have fragile fine curly hair so please help me decide what to get.

Also please suggest some brands for either one of them and heat protectants.

From my side here are advantages and disadvantages I see from both the tools.

STRAIGHTENER

Advantages:

1. Fine styling

2. Less breakage as it's not a comb like design

Disadvantages:

1. It's gonna have long term damage since it's strong and uses heat

BLOW DRY BRUSH

Advantages:

1. Better for hair cause it uses air

2. Healthier for long term

Disadvantages:

1. Would cause so breakage cause of the comb design