Just for kicks...
Which is easier:
1: Buying the trumpet you like the sound of, then searching through the myriads of Mouthpieces to find the one that 'hits the sweet spot' to give the particular sound you want on that trumpet.
2: Buying the Mouthpiece you want, then looking for a trumpet that will sound the best with that mouthpiece (which is kind of like Trumpet finding you in this case as it could be anything that 'hits the spot' with the mouthpiece). - This is kind of interesting, adventure into the unknown.