The grass aint always greener. Some things sound better when folk crow about em.
All most people need to do, be it terriers or lurchers, is just take the time to evaluate what you want your game to be and not just this season but say over the next ten.... Then when you've got a fair idea of that, find a type, line, strain that will do the job you want.
Most importantly, when you've sorted both of the above out and this is the hard bit, think really hard about how to both preserve it and improve it.
Simples!!!