Wondering if anyone in this forum has considered the KEMP Edge Security Pack (ESP) as a TMG replacement. We have only very good things to say about the Kemp LoadMaster devices as load-balancers, having used them since early 2010 with Exchange and SharePoint without any downtime, but have no experience with the ESP, which is an add-on.
The KEMP Edge Security Pack
http://kemptechnologies.com/emea/microsoft-load-balancing/microsoft-forefront-tmg-replacement/
MCTS: Messaging | MCSE: S+M