I've been watching for a few years for a flight school to go out of business and get a cheap certified BATD at auction, but I haven't found one yet. I rent a TD2 from a local flight school for $25/hour and it's great.
Between the two, I'd go with the Redbird every day of the week. Gleim makes fine test prep books, but Redbird has been in the sim business for a long time and I've had really positive experiences with their equipment.
There was a competitor around for a while called FlyThisSim that had an LOA and it was about half the cost of the Redbird TD, but they were having trouble keeping up with orders and finally (I think) went out of business.
Anyway - if I were going to drop $10k on a BATD, it would be a Redbird.