but shouldn't I be able to elevate up from 128 if my browser (talking https here) can support it?you have to modify ciphers setting in clientssl profile.
sol7815: Configuring the cipher strength for SSL profiles (9.x - 10.x)
http://support.f5.com/kb/en-us/solutions/public/7000/800/sol7815.html
just in case this is for config utility (webui).
sol6768: Restricting Configuration utility access to clients using high encryption SSL ciphers (9.x - 10.x)
http://support.f5.com/kb/en-us/solutions/public/6000/700/sol6768.html
Should I have something set differently in the BigIP to default to the highest level possible or should I be changing a client browser setting to increase my rate?since we can't control all client, i prefer setting it on bigip side.