+1 on the CZ 550 FS! I have one in .243 and it is just a great gun - VERY accurate! Had it at the range last week and it was shooting sub-MOA groups (a pretty big deal for me - only gun I can do that with). Solid, dependable, good looking, accurate - can't say enough good things about it.
Never shot the T3 so I can't comment on it.
I have two CZ prestige models , one in 270 one in 06. They both shoot like target rifles. They have the best action the world has ever seen and the wood is almost custom grade. They are on the heavy side but carry easy. They have one model of the 550 that is guarranteed to shoot 1 inch groups at (check this out) 600 yards.. Oh I picked them up for 619.00 apiece