Pinarello sizing / fitting help please

stumpy paul
stumpy paul Posts: 197
edited September 2014 in Road buying advice
Am hoping to treat myself to a dogma (or fp Quattro if funds come up short), but unsure of sizing. I know I need to ride them but want to be able to take advantage of online deals that are too distant too.
I've had proper fittings in the past which yield:
Me - 5'7" / 171cm, 81 cm cycling inseam, 64kg.
Saddle top to centre bb = 715
top tube 535/540 + 110 stem (though I must admit I feel some discomfort base of neck these days as I age - over stretching?)
headtube + spacers = 150
So...... Am I right that the size I need is a 50, with 20mm or so of spacers + headset top?
Advice appreciated...

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