We are very much a Plantronics shop over Jabra... Nothing against Jabra, just had great luck with Plantronics since the 1990's so we stick with what works, so I would recommend the Plantronics Voyager 5200 series.
Going from an SX200 to a 3300 is the larger issue here, if the headset thing is the most troublesome problem you have, congratulate your vendor, they did a wonderful job. Usually the switch is kind of painful for customers, especially in hospitality environments.