I had rather ___ this bunch of flowers than that one.

                               I'd rather + (verb)                                

'I'd' is a contraction of the words 'I had' or 'I would.'

When using it with the word 'rather' you are suggesting you would like to do or prefer one thing more than another.

Here are some examples:

"I'd rather talk about this later."
"I'd like to eat at home than go get fast food."
"I'd rather ski than snowboard."