CL604 - probably the most successful product in this range, for a good reason. You can find some deals if you're not fixated on new equipment. Disadvantage, maybe: tricky in icy conditions (some accidents), won't climb when heavily loaded, baggage compartment small for this size of airplane.
G-IV - will do the job and can be found for reasonable prices. Disadvantage: narrow cabin, even tough some passengers just love these windows.
F2000 - not enough range, but nice cabin, good size baggage compartment and good performance.
F2000EX EASy - too expensive yet, but range is not a problem any more.
Best bang for the buck here: F2000EX 'classic' (= pre-EASy model). Exactly the same as the EASy minus the big screens up front = cheaper.
Only 27 of them ever built.
Good luck!