hmmm, i think you are all missing one big point here, and that is the approx 10k difference in price.
I fancied a 275, but after a good look around i could not justify the extra money needed for the 275 when a 27 is virtually the same, (and arguably faster).
Dont get me wrong i would have loved the 275 but with a young family my prioritys were to keep everyone happy on a limited budget.
So i think the answer to your question is how much money have you got.
In the 27's defence, i bought nosy last year from down brighton way and i have just started racing it up north, first proper race was yesterday and all i can say is, is what a brilliant boat, the race started in 25 knots and 1 mile into it we had wind over tide swell with breaking crests and the yachts next to me disappearing from sight in the troughs, but the boat coped marvelously ( iwas single handing as well) never having me woried.
As the race progressed and the wind dropped to 15 knots the boat really got going under full sail and took line honours over many 34 footers and bigger.
They are a cracking boat and you really feel them power up with each tweak you make.
you makes yer choice, yer pays yer money.