Something I wanted to mention - think about what you want to do with the dog and let this help drive your decision. There are compromises with any dog breed, including working dogs, and anyone that tells you otherwise is blowing smoke. If you want to do a couple easy blood tracks a year - easy for the dog, not necessarily easy for you - then you probably don't need a high powered dog. I know of several guys that are way over dog-powered for what they do. They go out and buy a $2000 dog, from what they consider to be top bloodlines, then do 2 easy tracks a year with him. Heck, its a free country, but this seems like buying a Maserati to commute 10 miles to work, to me.
My wife and I tend to go overboard with things, but I know we put around 150 hours of tracking work into our dog his first year (training him from 8 weeks old) - and made a dedicated effort and got him on 13 real wounded deer tracks by the time he was 6 months old. We DID NOT need to do this for him, but for US - the key to successful tracking is the dog/handler relationship. You aren't a dope on a rope behind the dog, but a team. Poorly developed teams will find the easy deer - but the 40 hour tracks with no visible blood that go for a mile take a dedicated team effort.
We really love tracking, and it is something my wife has gotten into whole hog. Even so, I feel that we NEED to put in more time with him to honor the effort that went into his breeding and to help him develop his abilities fully.
Ryan