Hi,

Something similar, from big guys in the online travel business: Amadeus Affinity - http://www.amadeus.com/amadeus/x163551.html - accurate prices - choice per price range, comparison of prices on date range - destination per type of activity (beach, golf, whatever) - etc.

The URL for a major air travel company using it is - wait for it - ...

http://www.lufthansa.com/online/portal/lh/de/booking/affinit...

(Lufthansa Germany home page > Trip Finder)