Replying to HD export using FCP help

So I shoot on a 7D and have been editing in final cut pro 7
I use the dlsr plugin to import my shoots into final cut
I have been exporting using Quicktime conversion and then going straight to compress using the settings I found best for uploading to vimeo.
I am not sure if I am going wrong exporting out of final cut but the quality I have been getting when finally uploaded to vimeo is not what I want and have been seeing in other HDSLR edits.
I am just wondering what the best way to export to retain the best quality when I upload to vimeo