Personally, I prefer to use F5. Here are few links that can answer your questions - VMware Horizon View | Build It | F5 Networks
In last year VMworld 2013, F5 gave a wonderful presentation about their F5 Load balancer. Also you can use F5 PCoIP Proxy and replace your security servers. Imagine no one-to-one mapping, no certificate issues... In 5 Minutes or Less - PCoIP Proxy for VMware Horizon View | Featured | F5 Networks
Hope this helps.