resounding yes

Ｗ杯ブラジル大会の得点王となり，世界の注目を集めたコロンビア代表ＭＦのハメス・ロドリゲス選手のレアルマドリードへの移籍が決定しました。6年契約で，移籍金はおおよそ112億円，年俸は9億8000万円の超大型契約です。
resoundingは「はっきりした」（『プログレッシブ英和中辞典』小学館）という意味の形容詞で今回のmy answer is a resounding yesは「僕の答えは言うまでもなくyesさ」と解釈できます。
さらにa very great or complete success, victory etc（LDOCE）とあるように「勝利」や「成功」といった単語と相性がよく，a resounding victory（決定的な勝利）のように用いられることから（『プログレッシブ英和中辞典』同上），今回の契約の「成功」も暗に意味しているのではないでしょうか。（Koyamamoto）

James Rodriguez: World Cup star joins Real Madrid
(CNN) -- One of the World Cup's most exciting players has joined Real Madrid.
James Rodriguez -- Colombia's star man at Brazil 2014 and winner of the Golden Boot -- penned a six-year contract with the reigning European champion after his transfer from Monaco was completed in a reported $121 million deal.
The 23-year-old midfielder's six goals and two assists at the World Cup had heads turning at all the big clubs, but Real was destined to get its man after Rodriguez told Spanish sports newspaper Marca that he dreamed of playing for "Los Blancos."
"It's really flattering to know that a club of Real Madrid's stature is interested in me. It'd be a dream to join the club of my dreams," Rodriguez said.
"Would I jump at the chance to go to Real? No doubt about it, my answer is a resounding yes," he added.
It was then only a matter of time before Real Madrid came knocking on Monaco's door.
http://edition.cnn.com/2014/07/22/sport/football/james-rodriguez-joins-real-madrid/index.html?hpt=hp_bn2