I'd personally opt for either Prague or Frankfurt on one hand or Geneva or London, if you could sustain it financially, on the other hand.
I also have a hard time believing Geneva, have you actually been there? In Switzerland I would understand Zurich or Lausanne, but Geneva does not even have a technical university, compare that with ETH and EPFL.
* ETH (availability of talent from a good computer science research university)
* Good transportation alternatives (you can get a direct flight to/from Zurich from/to most major airports, direct high speed trains are also available to France and Germany)
* Business friendly tax rates (relative to other European countries)
* Switzerland, in general, has high quality of life
Side note, Google has a sizable office in Zurich and is able to attract and keep talent from both Western and Eastern Europe.
Besides the banking sector the city is dead. No user group activities, no "cool shops" or startups. Highly expensive like Munich and Hamburg without having real benefits besides the great airport.