求救~美利達公路車的尺寸

最近為這件事焦頭爛額中~在01和網路上找了很久都沒有明確的答案,
事情是這樣的, 小弟剛入手ROAD880, 可是回家研究很久, 不知道到底是車架尺寸太大,
還是因為我頭一次騎不太習慣, 總覺的很趴.

之前去捷安特, 那裡的人看我的身高, 再看我彎腰下壓, 手指離地有五六公分, 說我適合捷安特S號車架,
而到了美利達, 那家店說我其實騎美利達L號也可以...最後是買M號了.
希望各位01版友可以幫忙解答, 如果這個M號車架對我來說尺寸真的太大, 我就得趕緊脫手了OTZ

先謝謝大家!

以下附上我的資料

Measurements
-------------------------------------------
Inseam: 78
Trunk: 60
Forearm: 34.8
Arm: 66.7
Thigh: 59.5
Lower Leg: 54.5
Sternal Notch: 144.5
Total Body Height: 174.5


The Competitive Fit (cm)
-------------------------------------------
Seat tube range c-c: 50.5 - 51.0
Seat tube range c-t: 52.1 - 52.6
Top tube length: 54.2 - 54.6
Stem Length: 10.9 - 11.5
BB-Saddle Position: 69.7 - 71.7
Saddle-Handlebar: 51.8 - 52.4
Saddle Setback: 3.3 - 3.7


The Eddy Fit (cm)
-------------------------------------------
Seat tube range c-c: 51.7 - 52.2
Seat tube range c-t: 53.3 - 53.8
Top tube length: 54.2 - 54.6
Stem Length: 9.8 - 10.4
BB-Saddle Position: 68.9 - 70.9
Saddle-Handlebar: 52.6 - 53.2
Saddle Setback: 4.5 - 4.9


The French Fit (cm)
-------------------------------------------
Seat tube range c-c: 53.4 - 53.9
Seat tube range c-t: 55.0 - 55.5
Top tube length: 55.4 - 55.8
Stem Length: 10.0 - 10.6
BB-Saddle Position: 67.2 - 69.2
Saddle-Handlebar: 54.3 - 54.9
Saddle Setback: 4.0 - 4.4