The three calibers in question are all proven performers in terms of trajectory and accuracy. I don't think you are going to find enough difference in any of the three, especially in a quality rifle with a quality scope, to warrant favoring one for that reason alone. Rather you might think about bullet weight and performance on game at the long ranges you might encounter hunting antelope.
The .243 is a bit marginal in this area. The maximum bullet grain you can readily find in this caliber is 100 grain. Even a bonded or partitioned bullet of this weight may have trouble punching through heavier bone mass with desirable velocity on an antelope shoulder at tougher angles beyond 250+ yards.
The .25-06 fares better, with a bullet weight up to 120 grains available. The sustained velocity out to 400+ yards is also slightly better, so that a good bonded or partitioned bullet will likely perform well enough even on heavy bone mass at tough angles.
If you want an even broader margin of error, the 6.5x55 offers bullet weights of 140 grains in most factory loads. Though the downrange velocity is slightly less, even without a premium bullet you are likely to get satisfactory performance even on tougher shots on deer and antelope out to 400+ yards.
For the above reasons my recommendation would be the Swede (I am biased, having never shot the .25-06). It probably offers the best compromise between accuracy and bullet choice of the three. The .25-06 might be the better choice if nail-driving accuracy at 300+ yards and extremely flat trajectory are top considerations. JMHO
