I liked the Sabre quite a bit. Beautiful handling, like a fighter, a real pilot's airplane, nice and quiet, and the 80 had the best thrust-to-weight ratio of 'em all, from what I know of the others. Drawbacks include spar corrosion, and hodge-podge avionics . . . . and don't get too slow in the climb- keep it above .70, that's for sure.
As for the icing- I only flew a FL-based one for a year, but we never had any problem . . . fly high and fast, with a high-speed penetration on the arrival (2-1 versus 3-1) . . . know what your RAM rise is at different speeds, and use it to your advantage.
The 65 might be a better choice, though, depending on your typical mission length, and the Garett engines aren't the museum pieces the CF700's are!