I opened this with G8 anticipation (aka CISCO's pedigree)...

HMMMM
You perfectly nailed a theme through those 4...

Here is the challenge -
These are totally polarized and on a scale of style and brain attack sanity testing way off the centre of the bell curve for the Cisco efforts.
Can you put together another 4 which are totally up the other end of the scale??
A tough gig.. But either way thanks..
Cheers
AP