In reply to Croakinglizard: I had the same problem - found putting my feet in the Scarpa Mantas felt like putting them in a bath tub - masses of space.
Since then, I've got myself some Sportivas which are a lot narrower and lower volume - I've got the Trango Extreme (B3), but the fit on the Trango Alp (B2) and the Trango S (B1~2) are pretty similar or the same.