NGINX Plus vs. F5 BIG-IP: A Price-Performance Comparison

Nice but: - admin interface? For having managed plenty of Apache servers running as reverse proxy servers, it's nice to have a GUI when there are hundreds of rules you can mess^Wfuck with - high end appliance? I mean it's cool 2 Nginx Plus running on 2 R730 can have the same RPS than one 11050 but then how do you route traffic to these 2 Nginx servers?