Another frame size advice thread please!

magsm5
magsm5 Posts: 2
edited July 2010 in Road buying advice
I'm looking at buying a Focus bike which is only available online, so can't try out for size.

Could anyone give me advice on what size would suit me?

My details:
Height: 177.50 cm
Sternum Notch: 146.00 cm
Inseam Length: 86.50 cm
Arm Length: 63.50 cm
Shoulder Width: 38.00 cm

Am swithering between the medium and large frame which have stats as follows:
M/54 seat tube 540mm top tube 543mm head tube 135mm
L/56 seat tube 560mm top tube 555mm head tube 150mm

the rest of the stats are at http://www.focus-bikes.com/gb/en/bikes/ ... /cayo.html if that helps at all!!

Thanks :)