I'll say this to you mate:
Once you've got yourself a dog that's catching rabbits you'll look around you and notice all the other quarry out there to catch ! My advice would be to choose a dog that will be capable of taking other quarry as well. You'll have the dog for at least 9-10 years and I reckon in that time as you both get older you'll end up hunting other quarry whether you choose to or not !
All the best
Brummy
the best advice you will get, all the best