I'd recommend getting the New Tribe Aero hunter Kestrel. It is there new saddle and was just released. The problem is you probably won't have it before October 1st. As far as sizing you can go to their site and following their instructions. It is based on waist size.
If you can not wait, you can look in the classifieds and on ebay for used trophyline tree saddles or a new tribe aero hunter evolution. I think you'd probably be a large tree saddle and a size 2 evolution (again depends on waist size). You can also get a guido's web, they will only be available until the end of the year.
What are you looking for in a saddle? The web is larger and bulkier but it is as comfortable as a recliner. The other's are much lighter and more suited for more mobile hunting and can be very comfortable as well, just nothing will be as comfortable as a web.