Wallingford Bike Parts (wallbike.com) is a great place to get Brooks saddles from because they have a good stock and (more important) allow returns if you don't like the saddle. We've bought a number of Brooks saddles from Wallingford and have found them to be prompt, fair, and reliable.

I try to patronize my local bike shops, but for Brooks saddles we go Wallingford because of the return policy.

For the original poster, congrats on the new LHT. My wife loves hers and doesn't use her other bikes any more. Note that we did not have the bike shop cut the steering tube on the fork down, and she likes it uncut. So don't have it cut too low, or maybe even consider holding off cutting the fork until you find what works for you. You can always cut it later.