We've recently published an updated version of our price and feature comparison for Snapt. Highlighted in this is F5 and Citrix, two leading ADC competitors of ours.
We are (of course) looking at software (VM) products only, with full support. Our primary comparisons are throughput and SSL transactions per second (with 2k keys), and you can see some of the detail above.
Snapt offers a very high performance software-only solution, and our tests are on a 2-core 4GB virtual machine. We understand the need for commodity compute with high performance ADC.
If you'd like to try Snapt, get a free trial from our website.